Airbus abbreviations and acronymsDear portal user, The aeronautical industry has been using abbreviations and acronyms for a long time! We have designed the abbreviation and acronym list below to help you find the meaning of such series of letters! The abbreviations and acronyms are extracted from ‘Lexinet’, our Airbus terminology reference tool. It also contains the vocabulary in use at Airbus and provides definitions of terms. Abbreviations and acronyms are listed with a status in the 3rd column: . The “Approved” ones can be used in all documents and data related to Airbus programs without restrictions. . The “For information” ones may be found in the Airbus environment, but they shall not be used in Definition Dossiers or technical publications. To find the meaning of a specific abbreviation or acronym, just press together the ‘Ctrl’ and ‘F’ keys on your PC keyboard and fill out the small box at the top. Then press enter until you get the abbreviation in the left column: You will then find the full form of the abbreviation in the centre column. Abbreviation Full Form Status 3D Three Dimensional (Lat, Long, Alt) Approved 4D Four Dimensional (Lat, Long, Alt, Time) Approved A Amber Approved A Air For information A Alternate For information A Area For information A/BRK Autobrake Approved A/C Aircraft Approved A/COLL Anti-Collision Approved A/D Analog/Digital Approved A/DC Analog-to-Digital Converter Approved A/F Auto Flight For information A/G Air to Ground Approved A/L Airline Approved A/N Alphanumeric Approved A/N SIZE Alpha Numeric Size For information A/R Audio Reproducer For information A/S Airspeed Approved A/S Auto Stabilization For information A/SKID Anti-Skid Approved A/STAB Auto Stabilizer Approved A/T Adjustment/Test For information A/THR Autothrust Approved A/XFMR Autotransformer Approved A.ICE Anti-ice For information A.ICE Anti-icing Approved A|P Airbus|People For information A2P Assurance, Prevention, Protection For information AA Airworthiness Authorities For information AA Arithmetical Average For information AAA Airworthiness Approval Attestation For information AAAH Airbus Approved Abbreviations Handbook For information AAC Airline Administrative Communications Approved AACD Aeronautical Administrative Communication Domain For information AADC Analog Air Data Computer For information AAI Aircraft Accident and Incident Investigation For information AAIB Aviation Accident Investigation Board For information AAL Above Aerodrome Level For information AAM Airbus Acceptable Mass For information AAMD Aeronautical Administrative Maintenance Domain For information AAMG Airbus Application Management Group For information AAP Additional Attendant Panel Approved AAP Aft Attendant Panel Approved AAT Aircraft Allocation Table For information ABBR Abbreviation For information ABCD Airbus Collective Data Dictionary For information ABCM Alternate Brake Control Manifold Approved ABCU Alternate Braking Control Unit Approved ABD Airbus Directive and Procedure Approved ABDC Avionics Broadcast Data Collector Approved ABEC Airbus (Beijing) Engineering Centre Company Limited For information ABM APU Build-up Manual Approved ABM Abeam For information ABN Abnormal Approved ABNORM Abnormal Approved ABP Airbus Business Process For information ABPM Avionics Bare Processing Module Approved ABRN Airborne Approved ABS Autobrake System Approved ABS Airbus Standard For information ABSELV Alternate Brake Selector Valve Approved ABSORB Absorber Approved ABS VAL Absolute Value For information ABTS Avionics Blowing Temperature Sensor For information ABV Above Approved AC Aircraft Characteristics - Airport and Maintenance Approved Planning AC Alternating Current Approved AC Advisory Circular For information AC Actual Cost For information ACARE Advisory Council for Aeronautics Research in Europe For information ACARS Aircraft Communication Addressing and Reporting Approved System ACAS Airborne Collision Avoidance System For information ACC Active Clearance Control Approved ACC Area Control Center For information ACC Aircraft Configuration Control For information ACCEL Acceleration/Accelerate Approved ACCESS Accessory For information ACCLRM Accelerometer Approved ACCU Accumulator Approved ACCUR Accuracy Approved ACD Additional Control Device Approved ACD Airframe Certification Document For information ACD Airworthiness Certification Dossier For information ACD Aircraft Control Domain Approved ACDB Aircraft Component Data Base For information ACE Airbus Concurrent Engineering For information ACE Altimeter Control Equipment For information ACFT Aircraft Approved ACFU Aircraft Check Follow Up For information ACG Aircraft Center of Gravity For information ACG Airbus Configuration Guide For information ACGS Aircraft GSM Server Approved ACIA Asynchronous Communications Interface Adaptor For information ACJ Advisory Circular-Joint For information ACK Acknowledge Approved ACL Aircraft Configuration List For information ACLSP Aircraft Loadable Software Part For information ACM Air Cycle Machine Approved ACM Abbreviated Component Maintenance Manual For information ACM Aircraft Configuration Matrix For information ACM Aircraft Conversion Manual For information ACMB Aircraft Configuration Management Board For information ACMM Abbreviated Component Maintenance Manual Approved ACMM Aircraft Configuration Meta Model For information ACMP Airframe Condition Monitoring Procedure Approved ACMR Aircraft Configuration Management Rules Approved ACMS Aircraft Condition Monitoring System Approved ACMS-SA ACMS-Server Application Approved ACMT Aircraft Component Management Team For information ACN Aircraft Classification Number Approved ACO Airworthiness Certification Office For information ACOB Automatic Call Out Box For information ACOC Air Cooled Oil Cooler Approved ACP Area Call Panel Approved ACP Audio Control Panel Approved ACP Altimeter Check Point For information ACQ Acquire Approved ACQN Acquisition Approved ACR Avionics Communication Router Approved ACRIF ACR Instrumentation Function Approved ACRS Avionics Communication Routing System Approved ACRT Additional Cross Reference Table For information ACS Access For information ACS Alternating Current Supply For information ACSA Atelier du Calculateur en Structure Aéronautique For information ACSC Air Conditioning System Controller Approved ACT Active Approved ACT Additional Center Tank Approved ACT Activity For information ACT Applicability Cross-reference Table For information ACT AIRBUS COMPETENCE TRAINING Approved ACTD Actuated For information ACTG Actuating Approved ACTIV Active Approved ACTN Action For information ACTR Actuator Approved ACTVN Activation Approved ACTVT Activate Approved ACU Air Cooling Unit Approved ACU Antenna Coupler Unit For information ACU Antenna Control Unit Approved ACUTE Airbus Cockpit Universal Thrust Emulator Approved ACVR Alternating Current Voltage Ratio For information ACWP Actual Cost of Work Performed For information AD Aerodrome For information AD Airplane Datum For information AD Airworthiness Directive Approved A-D Airbus Deutschland For information ADAM Airbus Spares Distribution and Materials System For information ADAP As Designed As Planned For information ADAU Auxiliary Data Acquisition Unit For information ADB Airport DataBase Approved ADB Area Distribution Box Approved ADB Aeronautical DataBase For information ADB Automatic Differential Braking For information ADC Air Data Computer Approved ADC Airbus Delivery Centre For information ADCL Airworthiness Directives Compliance List For information ADCN Avionics Data Communication Network Approved ADCOMS Advanced Configuration Management System For information ADCSIP Acceptance and Delivery Customer Satisfaction For information Improvement Programme ADD Addition Approved ADD Additional Approved ADD Aircraft Description Data Base For information ADD Aircraft Design Declaration For information ADD Aircraft Description Document For information ADD BY Added By For information ADF Automatic Direction Finder Approved ADG Air Driven Generator Approved ADGB Active Differential Gearbox Approved ADHF Adaptive Droop Hinge Function Approved ADI Attitude Director Indicator Approved ADIRS Air Data/Inertial Reference System Approved ADIRU Air Data/Inertial Reference Unit Approved ADIS AFDX Digital Injection System Approved ADJ Adjust For information ADJMT Adjustment For information ADL Airborne Data Loader For information ADL Aircraft Data Loader For information ADL Allowable Damage and Limitations For information ADL Applicable Documents List For information ADM Air Data Module Approved ADM Administrative Files For information ADMZ Aircraft DeMilitarized Zone Approved ADNS Airbus Document Numbering Service For information ADO Airbus Documentation Office For information ADOPT Airbus Design and Operational Philosophy in Training For information ADPM Aircraft Deactivation Procedures Manual Approved ADPTN Adaptation For information ADPTR Adapter Approved ADR Air Data Reference Approved ADR Advisory Route For information ADRES Aircraft Documentation Retrieval System For information ADRS Address For information . ADS Air Data System Approved ADS Automatic Dependent Surveillance Approved ADS Airbus Document Services For information ADS-B Automatic Dependent Surveillance-Broadcast Approved ADS-C Automatic Dependent Surveillance-Contract Approved ADSM Avionics Data Storage Module Approved ADU Area Distribution Unit Approved ADU Align Display Unit For information ADV Advisory Approved AD² Advancement Degree of Difficulty For information A-E Airbus Espana For information AEB Airline Engineering Bulletin For information AECI Airbus Engineering Center India For information AECM Alternate Extension Control Module Approved AECMA The European Association of Aerospace Industries For information AEDS Axle Equipment Drive Shaft For information AEDS Airbus Enterprise Directory Service For information AEEC Airlines Electronic Engineering Committee For information AER Aircraft Event Report For information AERO Aviation Routine Weather Report For information AES Aircraft Earth Station Approved AESS Aircraft Environment Surveillance System Approved AESU Aircraft Environment Surveillance Unit Approved AEVC Avionics Equipment Ventilation Computer Approved AEX Access Authorized For information AF Audio Frequency Approved AF Acceptance Flight For information AF All Freighter For information AF DME Arc to Fixed Waypoint For information A-F Airbus France For information AFB Antifriction Bearing For information AFC Automatic Frequency Control For information AFCS Automatic Flight Control System For information AFDX Avionics Full Duplex Switched Ethernet Approved AFECU Automatic Fire Extinguishing Control Unit Approved AFFECTD Affected Approved AFFIRM Affirmative Approved AFI Aircraft Fault Isolation Approved AFIS Airline In Flight Information System For information AFL Auto Flush Approved AFM Airplane Flight Manual Approved AFMC Auxiliary Fuel Management Computer Approved AFMR Airframer Approved AFN ATS Facilities Notification Approved AFP Advanced Fiber Placement For information AFR Airframe For information AFR Aircraft Fault Reporting Approved AFRP Aramid Fiber Reinforced Plastic Approved AFS Automatic Flight System Approved AFSA Airbus France Standard Architecture For information AFTN Aeronautical Fixed Telecommunication Network For information AFTR After Approved AFU Artificial Feel Unit For information AGB Accessory Gearbox Approved AGB Angle Gearbox Approved AGC APU Generator Contactor Approved . AGC Automatic Gain Control Approved AGE Aircraft Ground Equipment Approved AGG Airbus General Guide For information AGL Above Ground Level Approved AGMT Augment For information AGP Alternate Gauging Processor Approved AGS Air Generation System Approved AGS Aircraft GSM Server For information AGS Aircraft General Stores For information AGT Agent For information AGU Air Generation Unit Approved AGW Actual Gross Weight Approved AHP Anti-Hijacking Panel For information AHRS Attitude and Heading Reference System For information AHRU Attitude and Heading Reference Unit For information AI Anti-Icing For information AIB Airbus Industrie For information AIB Accident/Incident Investigation Board For information AIBU Advanced Illumination Ballast Unit Approved AIC Access Illustration Cards For information AIC Airbus Integrated Company For information AIC Accident/Incident Investigation Committee For information AICC Aviation Industry CBT Committee For information A-ICE Anti-Ice Approved AICF Anti Ice Control Function Approved AICS Anti Ice Control System Approved AICU Anti Ice Control Unit Approved AID Aircraft Installation Delay For information AIDA Airbus Industrie Drawing Access For information AIDA Attestation Integrated Delta Aggregation For information AIDS Aircraft Integrated Data System Approved AIG Accident Investigation For information AIL Aileron Approved AIM Aircraft Integrated Maintenance Approved AIM Airbus Military For information AIM/CRM Airbus Integrated Management/Cockpit Resource For information Management AIME Autonomous Integrity Monitored Extrapolation For information AIM-FANS Airbus Interoperable Modular-Future Air Navigation Sys For information AIMI Avionics Information Management Interface Approved AIMS Airbus Improvement Management System For information AIMS Airbus Material Specification For information AIMS Airbus Inventory Management System For information AIN Airbus Integrated Network For information AINA Airbus North America For information AINS Aircraft Information Network System Approved AIP Attendant Indication Panel Approved AIP Aeronautical Information Publication For information AIP Accident/Incident Investigation Panel For information AIPC Aircraft Illustrated Parts Catalog Approved AIPI Airbus Process Instruction For information AIPS Airbus Process Specification For information AIQI Airbus Industrie Quality Instruction For information AIR Aircraft Inspection Report For information AIRCOND Air Conditioning For information . Extension and/or Free Fall test Approved ALT TO Alternate To For information ALTU Annunciator Light Test Unit Approved ALU Arithmetic and Logic Unit For information AM Amplitude Modulation Approved AM Airbus Means and Methods Document For information AMAM Airbus MSG-3 Analysis Management For information AMB Ambient Approved AMC Acceptable Means of Compliance For information AMD Aircraft Maintenance Description Approved AMDB Airport Mapping DataBase Approved AME Amplitude Modulation Equivalent Approved AMEX Avionics Message Exchanger Approved AMF Avionics Messaging Forwarder For information AMI Airline Modifiable Information For information AMII Airlines Maintenance Inspection Intervals For information AMISA Advanced Model-Integrated Specifications for Airbus For information AMJ Advisory Material-Joint For information .AIRMAN Aircraft Maintenance Analysis For information AIRNet Airbus International Research Network For information AIRTAC AIRbus Technical AOG Center For information AIRTEC Airbus Technical AOG Center For information AIS Audio Integrated System Approved AIS Aeronautical Information Service For information AISD Airline Information Services Domain Approved AISI American Iron and Steel Institute For information AISS Aeronautical Information Systems Security For information AIT Accident Information Telex Approved AIT Accident Information Transmission For information AITM Airbus Test Method For information AIU Aircraft Interface Unit Approved AKC Assembly Key Characteristic For information AL Airline For information ALE Automatic Link Establishment Approved ALERFA Alert Phase For information ALF Aft Looking Forward For information ALHP Airframe Life-History Program For information ALI Airworthiness Limitation Item For information ALI Airbus Lead Investigator For information ALIGN Alignment Approved ALIGND Aligned Approved ALLWD Allowed Approved ALM Application Landscape Management For information ALNA Airline Network Architecture Approved ALPHA Angle-of-Attack Approved ALPHANUM Alphanumerical For information ALPS Aircraft Lease Portfolio Securitisation For information ALS Approach Light System For information ALS Airworthiness Limitation Section Approved ALSCU Auxiliary Level Sensing Control Unit Approved ALT Altitude Approved ALT ACQ Altitude Acquire For information ALTM Altimeter Approved ALTN Alternate Approved ALTN Alternative Approved ALT REFF Alternate to a Retraction. AMM Aircraft Maintenance Manual Approved AMM Ammeter For information AMOC Acceptable Means Of Compliance For information AMP Amperage For information AMP Ampere For information AMP Avionics Maintainability Plan For information AMP Aircraft Maintenance Procedure Approved AMPL Amplifier Approved AMS Air-ground Message Server Approved AMS Aeronautical Material Specifications For information AMS Aerospace Material Specification For information AMS Aircraft Modification Status For information AMSL Airbus Military Sociedad Limitada For information AMTOSS Aircraft Maintenance Task Oriented Support System For information AMU Audio Management Unit Approved AN Air Navigation For information ANCE Announce For information AND Aircraft Nose Down For information ANDT Aircraft Non Destructive Test Approved ANF Airport Navigation Function Approved ANI Analog Input Approved ANLG Analogic Approved ANN Annunciator Approved ANNCE Announce Approved ANNCMT Announcement Approved ANN LT Annunciator Light For information ANO Analog Output Approved ANPT Aeronautical National Taper Pipe Threads For information ANSA At Nearest Suitable Airport Approved ANSI American National Standards Institute Approved ANSU Aircraft Network Server Unit Approved ANT Antenna Approved ANU Aircraft Nose Up For information AO Access Opening For information AOA Angle Of Attack Approved AOAS Angle of Attack Sensor For information AOC Airline Operational Control Approved AOC Air Operator's Certificate For information AOD Audio on Demand Approved AOG Aircraft On Ground Approved AOHX Air/Oil Heat Exchanger Approved AOLS Airbus On-Line Services For information AOM Aircraft Operating Manual Approved AOMT Airbus Onboard Maintenance Tool Approved AOP Airbus Operational Plan For information AOPM Airbus Operational Process Map For information AORL Airbus Operation Readiness Level For information AOS Aircraft Operational Seminars For information AOT All Operators Telex Approved AOT All Operator Transmission For information AP Autopilot Approved AP Airborne Printer For information AP Airbus Procedure For information AP Airworthiness Procedure For information AP/FD Autopilot/Flight Director Approved APASHE Aircraft Publication Automated Shipping Expedite For information . APC Area Positive Control For information APC Airbus Planning and Control For information API Application Programming Interface Approved APLC Aircraft Power Line Conditioner Approved APM ARINC Processing Module Approved APM Aircraft Performance Monitoring Program For information APM Airport Planning Manual For information APP Appearance Approved APP Approach Control-Approach Control Office Approved APPL Application Approved APPR Approach Approved APPROX Approximately Approved APPU Asymmetry Position Pick Off Unit Approved APQ Airline Pre-Qualification For information APQP Advanced Product Quality Planning For information APS Avionics Printing Service Approved APS Absolute Pressure Sensor For information APS Aircraft Prepared for Service For information APS Auxiliary Power Supply For information APS Auxiliary Power System For information APT Acceptance Production Test For information APT AIRBUS PILOT TRANSITION Approved APU Auxiliary Power Unit Approved APU AFE APU Automatic Fire Extinguishing Control Unit Approved AQP Advanced Qualification Program For information AR As Required Approved AR Audio Reproducer For information ARA Aircraft Research Association For information ARA Airworthiness Risk Assessment For information ARBS Aerial Refuelling Boom System For information ARC Air Refueling Computer Approved ARC Authorized Released Certificate For information ARG Arresting Gear or Hook For information ARINC Aeronautical Radio Incorporated Approved ARM Aircraft Recovery Manual Approved ARM Airworthiness Review Meeting For information ARMD Armed For information ARMG Arming For information ARMT Armament For information ARN Aircraft Registration Number Approved ARND Around For information ARO After Receipt Order For information ARP Aerospace Recommended Practice Approved ARP Aerodrome Reference Point .Airport Reference Point For information ARP Airbus Resource Planning For information ARP Airworthiness Review Panel For information ARPT Airport Approved ARQ Airline Routine Queries For information ARR Arrival For information ARR Arriving For information ARS Airworthiness Review Sheet For information ARS FU Airworthiness Review Sheet Follow Up For information ART Active Repair Time For information ART Airbus Road Transport For information ARTCC Air Route Traffic Control Centre For information ARTCLD Articulated For information . For information ASCOM Aircraft Standard Configuration Management For information ASCU Air Systems Control Unit Approved ASD Accelerate Stop Distance Approved ASD Airborne Services Domain For information ASD Aircraft Schematic Diagram Approved ASD AeroSpace and Defense Industries Association of Europe For information ASDC Airline Service Data Collection For information ASE Airborne Support Equipment Approved ASE Airbus Supplied Equipment For information ASF Amperes per Square Foot For information ASF Avionics Server Function Approved ASFC Avionics Server Function Cabinet Approved ASG Airbus Security Group For information ASI Airspeed Indicator Approved ASIC Application Specific Integrated Circuits Approved ASLC ACD Security Log Collector Approved ASM Aircraft Schematics Manual Approved ASM American Society for Metals For information ASM Air Separation Module Approved ASMA Aircraft Systems Maintenance Aids For information ASN Aerospatiale Norme (Standard) Approved ASO Assembly Stage Operation For information ASP Audio Selector Panel Approved ASP Airbus Supplier Part For information ASPIRE Application and Software Products ICT REpository For information ASPSU Autonomous Standby Power Supply Unit Approved ASR Airport Surveillance Radar For information ASR Aircraft Structural Repair Approved ASS Aircraft Security System Approved ASSC Aircraft Security Steering Committee For information ASSCU Aircraft Security System Control Unit Approved ASSY Assembly Approved ASU Attendant Service Unit Approved ASV Alternate Servo Valve For information ASYM Asymmetric(al) Approved AT Autothrust Approved AT Autothrottle For information ATA Actual Time of Arrival Approved ATA Air Transport Association of America Approved ATA Assembly Test Article For information ATAM Airbus Takeoff Analysis Module For information ATB ATA 100 Breakdown For information .ARTF Artificial Approved ARU Aircraft Router Unit Approved ARU Audio Reproducer Unit Approved ARV Alternate Refill Valve Approved AS Airscoop For information AS Airspeed For information ASA All Speed Aileron Approved ASA Audio and Sign Adapter Approved ASAC Airbus Statement of Airworthiness Compliance For information ASAP As soon as possible For information ASAP Advanced Statistics Analysis Project For information ASCII American Standard Code for Information Interchange Approved ASCO Airbus Service Company Inc. ATC Air Traffic Control Approved ATC Airbus Training Center For information ATCA Air Traffic Control Board For information ATCDB Aircraft Technical Characteristics Data Base For information ATCH Attach(ment) For information ATCI Air Traffic Control and Information Approved ATCK Attack For information ATCRB Air Traffic Control Radar Beacon Approved ATCSS Air Traffic Control Data Link Signalling System For information ATD Actual Time of Departure Approved ATD Aircraft Technical Definition For information ATD Applicable Technical Documents For information ATE Automatic Test Equipment Approved ATEC Automatic Test Equipment Complex For information ATI Air Transport Indicator Approved ATI Airbus Transport International For information ATIMS Air Traffic and Information Management System Approved ATIS Automatic Terminal Information Service Approved ATL Applicable Tool List For information ATL Automatic Tape Laying For information ATLAS Abbreviated Test Language for Avionics Systems Approved ATLAS Abbreviated Test Language for All Systems For information ATM Air Traffic Management Approved ATM Aircraft Transportability Manual For information ATM Available Ton-Mile For information ATMG Airbus Technical Management Group For information ATMS Advanced Text Management System For information ATN Aeronautical Telecommunications Network Approved ATO Authorization to Offer For information ATQC Airbus Temporary Quick Change Approved ATR Austin Trumbull Radio Approved ATRCCS Automatic Turbine Rotor Clearance Control System Approved ATS Air Traffic Service Approved ATS Autothrottle System Approved ATS Airbus Technical Specification For information ATS Autothrust System For information ATSAW Airborne Traffic Situational Awareness Approved ATSCD Air Traffic System Communications Domain (ATSCD) For information ATSU Air Traffic Service Unit Approved ATT Attitude Approved ATT Attitude Reference For information ATTEN Attenuation For information ATTND Attendant Approved ATU AutoTransformer Unit Approved ATUC ATU Contactor Approved ATULC ATU Line Contactor Approved ATUPU ATU Protection Unit Approved ATZ Aerodrome Traffic Zone For information AUD Audio For information AUDSWTGSYS Audio Switching System For information AUDSWTGUNIT Audio Switching Unit For information A-UK Airbus UK For information AUTH Authorize For information AUTO Automatic Approved AUTOCAL Autocalibration For information AUTOLAND Automatic Landing Approved AUW All-Up Weight Approved AUX Auxiliary Approved AVAIL Availability Approved AVAIL Available Approved A-VaRTM Advanced Vacuum-assisted Resin Transfer Moulding For information AVG Asset Value Guarantee For information AVG Average For information AVIONICS Aviation Electronics For information AVIS Aircraft Virtual Insider System Approved AVM Avionics Video Module Approved AVNCS Avionics Approved AVOD Audio/Video on Demand For information AVRS Audio/Video Recording System For information AVS Avionics Ventilation System Approved AVV Air Vent Valve For information AWACS Advanced Warning (on) Aircraft Commercial Sales For information AWB Air Waybill For information AWD Aircraft Wiring Diagram Approved AWG American Wire Gage For information AWG Audible Warning Generator For information AWL Aircraft Wiring List Approved AWLS All Weather Landing System For information AWM Aircraft Wiring Manual Approved AWS American Welding Society For information AWS Airworthiness Security For information AWS Airbus Wiki Service For information AWSC Additional Work to Show Compliance For information AWY Airway Approved AX Longitudinal Acceleration Approved AX Access Authorized For information AY Lateral Acceleration Approved AZ Azimuth Approved AZ Vertical Acceleration For information AZFW Actual Zero Fuel Weight Approved B Blue Approved B/B Back-Beam For information B/C Business Class Approved B/D Bottom of Descent For information BAABI Basic Approved ATA Breakdown Index For information BAF BITE Access Function Approved BAF Baffle For information BAFO Best and Final Offer For information BAG Bandwidth Allocation Gap Approved BAL Basic Assembly Language For information BARC Barometric Altitude Rate Computer For information BARO Barometric Approved BAS Bleed Air System Approved BAT Battery Approved BAT Best Available Techniques For information BATLC Battery Line Contactor Approved BBAND Broadband Approved BBRG Ball Bearing For information BC Baggage Container Train For information BCD Binary Coded Decimal Approved BCD Bulk Cargo Door For information BCDS BITE Centralized Data System Approved BCF Brake Cooling Fan Approved BCL Battery Charge Limiter Approved BCM Backup Control Module Approved BCN Beacon Approved BCP Business Continuity Plan For information BCRC Bulk Crew Rest Compartment Approved BCRU Battery Charge and Rectifier Unit Approved BCS Brake Control System Approved BCS Braking Control System Approved BCU Brake Control Unit Approved BCV Bleed Control Valve For information BCWP Budgeted Cost of Work Performed For information BCWS Budgeted Cost of Work Scheduled For information BDD BITE Description Document For information BDIE Base de Données Installation Electrique For information BDLI Bundesverband der Deutschen Luft-und Raumfahrt For information Industrie BDPC Bracketing Design Principles Catalog For information BDSG BundesDatenSchutzGesetz (Federal Data Protection Act For information in Germany) BEA Bureau d'Enquête Accident For information BEAD-Air Bureau Enquêtes Accident Défense Air For information BEL CRK Bellcrank For information BER Beyond Economical Repair For information BETW Between For information BEV Bevel For information BEW Basic Empty Weight For information BFD Bi-Folding Door For information BFDAS Basic Flight Data Acquisition System For information BFE Buyer Furnished Equipment Approved BFE Buyer Furnished Equipment For information BFEMS BFE Management System For information BFO Beat Frequency Oscillator Approved BFR Buffer For information BG Build Group (Assembly Group) For information BGAN Broadband Global Area Network Approved BGC Build Group Component For information BGM Boarding Music Approved BGS Build Group Stack-Up For information BH Block Hours Approved BHD Bulkhead For information BIF BITE Interactive Folder For information BIP Best Industry Practice For information BIP Business Improvement Project For information BIST Built-in Self Test For information BITE Built-In Test Equipment Approved BIU BITE Interface Unit Approved BK Black For information BKFLW Backflow Approved BKUP Backup Approved BL Bleed Approved BLADE Breakthrough Laminar Aircraft Europe For information BLC Basic Lines Catalog For information BLES Brake Life Extension System Approved BLG Body Landing Gear Approved BLK Black Approved Amber. Green For information BRC Brace For information BRD Braid For information BRD Business Requirements Dossier For information BRDG Bridge For information BRG Bearing Approved BRIDGE BITE Referential and Information for Dataloading Generic For information Extracts BRK Brake Approved BRKNG Braking Approved BRKR Breaker Approved BRKS Brakes For information BRKT Bracket Approved BRT Bright Approved .BLK Block Approved BLKT Blanket For information BLOW Blower Approved BLST Ballast Approved BLSWT Bremen Low Speed Wind Tunnel For information BLT Bolt For information BLV Bleed Valve Approved BLW Below For information BLWG Blowing Approved BLWR Blower Approved BM Beam For information BM Beanstandungsmeldung For information BMC Bleed Monitoring Computer Approved BMI BITE Monitoring Interface Approved BMS Bulletin Météo Spécial For information BMS Business Management System For information BMSELV Body Mounted Selector Valve For information BND Bonded For information BNDG Bonding For information BNDRY Boundary Approved BNR Binary Approved BNR Binary Words For information BO Blocking Oscillator For information BO Body Odour For information BOH Brake-Off Weight For information BOH Bauunterlagen-Organisations-Handbuch For information BOL Bill Of Lading For information BOM Bill of Material For information BOMU Bleed and Overheat Monitoring Unit Approved BOOM Business Oriented Object Model For information BOS Business Operational Support For information BOT Begin of Tape Approved BOT Bottom Approved BP Bottom Plug For information BPCS Build Process Change Sheet For information BPL Business Project Leader For information BPR By-Pass Ratio For information BPR Business Process Re-design or Re-engineering For information BPS Backup Power Supply Approved BPTU Brake Pedal Transmitter Unit Approved BQM Business Quality Manager For information BR Brown For information BRAG Blue. Red. BRT Brightness Approved BSCS Braking and Steering Control System Approved BSCU Braking and Steering Control Unit Approved BSHG Bushing For information BSS Bare System Standard For information BST Bracket Selection Tool For information BSU Beam Steering Unit Approved BSV Body Shuttle Valve For information BT Bus Tie For information BTA Bogie Trim Actuator For information BTAC Bus Tie AC Contactor Approved BTC Bus Tie Contactor Approved BTCM Brake Temperature Compensation Module Approved BTDC Bus Tie DC Contactor Approved BTL Bottle Approved BTMS Brake Temperature Monitoring System Approved BTMU Brake Temperature Monitoring Unit Approved BTN Button Approved BtoP Built to Print For information BTR Bus Tie Relay Approved BTS Base Transceiver Station Approved BTS Brake Temperature Sensor For information BTSTRP Buttstrap Approved BTU British Thermal Unit For information BTV Brake to Vacate Approved BU Battery Unit Approved BUS Busbar Approved BUSS Back-Up Speed Scale For information BVID Barely Visible Impact Damage For information BWS Body Wheel Steering Approved BWV Bypass Water Valve For information BYDU Back-Up Yaw Damper Unit Approved BYP Bypass Approved c Equal Margin For information C Celsius Approved C Centigrade Approved C Close Approved C Cyan Approved C Clear For information C Cold (Electric Point) For information C Comparator For information C Convertible For information C/A Cabin Attendant For information C/B Circuit Breaker Approved C/L Checklist Approved C/M Command/Monitor For information C/M Crew Member For information C/O Change Over Approved C/S Call Sign Approved C/SSR Cost/Schedule Status Report For information CA Cable Assembly Approved CA Cable For information CA Constituent Assembly For information CA Certification Authority For information CA/CRL Certification Authority/Certificate Revocation List Approved CAA Central Aviation Archive For information . Health Review and Evaluation For information CARP Carpet For information CAS Calibrated Air Speed Approved CAS Calculated Air Speed For information CAS Collision Avoidance System For information CAS Computed Air Speed For information CAS Cabin Attendant Seat For information CAST Commercial Aviation Safety Team For information CAT Category Approved CAT Clear Air Turbulence For information CatAP Categorised Airbus Project For information CATCH Complex Anomaly Tracking and Search Approved cATD contractual Applicable Technical Document For information CATS Cross Application Time Sheet For information CAUT Caution Approved .CAA Civil Aviation Authority For information CAATS Computer Assisted Aircraft Trouble Shooting For information CAB Cabin Approved CAB PRESS Cabin Pressurization For information CAD Computer Aided Design For information CADB Components for Attestation Data Base For information CADETS Computer Assisted Documentation Education Tutorial For information System cADL contractual Applicable Documents List For information CaDoc Cabin Documentation Display Approved CAE Chief Airworthiness Engineer For information CAG Circulation Aérienne Générale For information CAGE Commercial And Government Entity For information CAI Combustion Area Inspection For information CAIR Constituent Assembly Inspection Report For information CAL Calibration Approved CAL Calibrated Approved CALC Cargo Acceptance and Load Control For information CAM Cabin Assignment Module Approved CAM Computer Aided Manufacturing For information CAM Customer Acceptance Manual For information CAM Crew Administration Manual For information CAM Continued Airworthiness Manager For information CAMO Continuing Airworthiness Management Organisation Approved CAN Controller Area Network Approved CAN Canopy For information CANC Cancellation Approved CANC Cancel For information CANCD Cancelled Approved CANTIL Cantilever For information CAO Cargo Aircraft Only For information CAOA Corrected Angle Of Attack Approved CAOM Cabin Attendant Operating Manual Approved CAP Capacitor For information CAP Component Availability Programme For information CAPLTY Capability For information CAPS Cabin Altitude Pressure Sensor For information CAPT Captain Approved CAR Cargo For information CAR Civil Aviation Requirements For information CARE Common Airbus Requirements Engineering For information CARE Continuing Airframe . CAX Compartment Air Extraction Approved CBAL Counterbalance For information CBB Connexion By Boeing Approved CBIT Continuous BITE Approved CBM Circuit Breaker Monitoring Approved CBMF Circuit Breaker Monitoring Function Approved CBMS Circuit Breaker Monitoring System Approved CBMU Circuit Breaker Monitoring Unit Approved CBO Cycles between Overhaul For information CBORE Counterbore For information CBP Circuit Breaker Panel Approved CBR California Bearing Ratio For information CBS Cost Breakdown Structure For information CBSV Cycles Between Scheduled Visits For information CC Current Comparator Approved CC Configuration Component For information CC Cabin Crew For information CCAR China Civil Aviation Regulations For information CCB Configuration Control Board For information CCB Change Control Board For information CCB Compartment Control Box Approved CCC Crash Crew Chart Approved CCC Component Change Card For information CCC Configuration Control Committee For information CCC Cabin and Cargo Customization For information CCC Crises Control Center For information CCCP Compressor Cavity Control Pressure Approved CCD Cursor Control Device Approved CCD Configuration Control Document For information CCG Cabin Configuration Guide Approved CCITT Consultative Committee International Telegraphy & For information Teleph CCM Configuration Control Management For information CCMail Cabin Crew Mailing Approved CCMD Configuration Conformity Management and For information Documentation CCMR Candidate Certification Maintenance Requirements For information CCOM Cabin Crew Operating Manual Approved CCQ Cross Crew Qualification For information CCQ Client Configuration Qualification For information CCR Credit Card Reader Approved CCR Customer Change Register For information CCR Cluster Component Responsible For information CCR Customer Confidence Review For information CCRC Cabin Crew Rest Compartment Approved CCRM Cabin Crew Rest Module Approved CCS Cabin Communication System Approved CCT Conditions Cross-reference Table For information CCU CSAS Control Unit Approved CCW Counter Clockwise Approved CD Compact Disk Approved CD Control Display Approved CD Cold Drawn For information CD Count Drag For information CD Cargo Door For information CD Case Drain For information . Read Only Memory For information CDS Component Documentation Status Approved CDS Control and Display System Approved CDS Cold Drawn Steel For information CDSS Cockpit Door Surveillance System Approved CDSU Cockpit Door Surveillance Unit Approved CDT Cabin Door Trainer For information CDT Central Development Team For information CDU Center Drive Unit Approved CDU Control and Display Unit Approved CD-WD Component Data Working Document For information CE Central Entity For information CE Change Event For information CE Centralized Equipment For information CECAM Centralized Cabin Monitoring For information CED Cooling Effect Detector Approved CEET Cabin Emergency Evacuation Trainer For information CEL Component Evolution List Approved CELLI Ceiling Emergency LED Light Approved CEO Chief Executive Officer For information CEPT Council of European Posts and Telegraphs For information CER Contrôle Essais et Réception Approved CEV Centre d'Essais en Vol Approved CEV Clutch Electro Valve For information CEV Commercial Equipment Ventilation For information CF Course to a Fixed Waypoint For information CF Configuration File For information CF Center Fuselage For information CFAR Certification First Article Review For information .CDA Cargo Door Actuator For information CDA Continuous Descent Approach Approved CDAM Centralized Data Acquisition Module Approved CDAS Cargo Door Actuation System Approved CDAU Centralized Data Acquisition Unit Approved CDB Configuration DataBase For information CDBT Component Design and Build Team For information CDC Cargo Door Controller Approved CDCV Cargo Door Control Valve Approved CDDS Component Documentation Data System For information CDE Consumption Data Exchange Card For information CDF Contractual Definition Freeze For information CDF1 Customer Definition Freeze For information CDF2/3 Customer Definition Freeze For information CDF4 Customer Definition Freeze For information CDIM Component Data Instruction Manual For information CDIS Customization and Delivery Information Services For information CDL Configuration Deviation List Approved CDLCU Cockpit Door Locking Control Unit Approved CDLS Cockpit Door Locking System Approved CDM Cockpit Door Module Approved CDM Coolant Distribution Module Approved cDMU Configured Digital Mock-Up For information CDP Compressor Discharge Pressure Approved CDP Community Deployment Process For information CDPL Community Deployment Process Leader For information CDR Critical Design Review For information CD-ROM Compact Disc . CFD Computational Fluid Dynamics For information CFDIU Centralized Fault Display Interface Unit Approved CFDS Centralized Fault Display System Approved CFE Customer Furnished Equipment For information CFF Cabin First Flight For information CFFC Cockpit Fixed Frequency Converter Approved CFG Customer Focus Group For information CFI Clearance for Installation For information CFIT Controlled Flight Into Terrain For information CFM Cable Fabrication Manual Approved CFM Cubic Feet per Minute For information CFMI CFM International Approved CFP Computerized Flight Plan For information CFR Code of Federal Regulations For information CFR Current Flight Report Approved CFRP Carbon Fiber Reinforced Plastic Approved CFS Cabin File Server Approved CFS Cold Finished Steel For information CFT Call For Tender For information CFVCU Cargo Fire Verification Control Unit Approved CFVS Cargo Fire Verification System Approved CG Center of Gravity Approved CGC Customer Ground Check For information CGCS Center of Gravity Control System Approved CGIB Control and Guidance Integration Bench For information CGM Computer Graphics Metafile For information CH Character Approved CH Center Hatrack For information CH Charge For information CH Cargo Hold Approved CHAM Chamfer For information CHAN Channel Approved CHAS Chassis For information CHG Change Approved CHIFS Configuration Handling and Industrialization of Field For information loadable Software CHK Check For information CHM Chime For information CHMBR Chamber Approved CHRG Charge Approved CHRO Chronometer Approved CI Cost Index Approved CI Cast iron For information CI Configuration Item For information CI Conversion Instruction For information CI Course to an Intercept For information CI Cost Improvement For information CICS Customer Information Control System For information CICS/VS Customer Information Control System/Virtual Storage For information CIDS Cabin Intercommunication Data System Approved CIM Continuous Image Microfilm For information CIM Customer Inspection Manager For information CIN Change Identification Number Approved CINS Cabin Information Network System Approved CIP Continuous Improvement Plan For information CIPOS CIDS Internal Power Supply For information . CIR Common Information Repository Approved CIRCE Conception Informatisée et Rationalisée des Câblages For information Electriques CIT Compressor Inlet Temperature Approved CIU Camera Interface Unit Approved CJC Cold Junction Compensation Approved CK Check Approved CKD Checked For information CKPT Cockpit Approved CKT Circuit Approved CL Center Line Approved CL Checklist Approved CL Climb For information CL Clip For information CL Clutch For information CL Circuit Letter For information CL Convergence Levels For information CL/OP Closure/Opening Approved CLAF Common Look And Feel For information CLB Climb Approved CLCTR Collector Approved CLD Closed For information CLDB Component Location Data Bank For information CLEDU Cabin LED Unit For information CLG Centerline Landing Gear Approved CLG Ceiling For information CLK Clock Approved CLM Component Location Manual Approved CLN Clinometer For information CLNG Ceiling Approved CLOG Clogging Approved CLOGD Clogged Approved CLP Clamp For information CLPR Clapper Approved CLR Clear Approved CLR ALT Clearance Altitude For information CLRD Cleared Approved CLRNC Clearance Approved CLS Cargo Loading System Approved CLS Cargo Loading System Manual Approved CLSD Closed Approved CLSG Closing Approved CLSM Crisis Logistic Support Manager For information CLTM Component Location Training Manual For information CLV Clevis For information CM Conversion Manual Approved CM Conversion Module Approved CM Call Maintenance For information CM Centimeters For information CM Collective Modification For information CM Configuration Management For information CMA Common Mode Analysis For information CMC Central Maintenance Computer Approved CMD Command Approved CME Configuration Management Enabler For information . CMEU Cabin Passenger Management Memory Expansion Unit Approved CMF Central Maintenance Function Approved CMFLR Cam Follower For information CMI Computer Managed Instruction For information CMIT Component Management and Integration Team For information CML Consumable Material List Approved CMM Calibration Memory Module Approved CMM Component Maintenance Manual Approved CMM Capability Maturity Model For information CMMI Capability Maturity Model Integration For information CMMM Component Maintenance Manual Manufacturer For information CMMV Component Maintenance Manual Vendor Approved CMOS Complementary Metal Oxide Silicon For information C-MOS Complementary Metal Oxyde Semiconductor Approved CMP Customer Maintenance Program For information CM P&A Certification Manager Parts and Appliances For information CMPLRY Complementary For information CMPLTD Completed Approved CMPNT Component For information CMPS CPLR Compass Coupler For information CMPTG Computing For information CMPTR Computer Approved CMR Certification Maintenance Requirements For information CMRLR Cam Roller For information CMS Central Maintenance System Approved CMS Code Matière Société Approved CMS Component Maintenance Sheet Approved CMS Cabin Management System For information CMS Content Management System For information CMT Cabin Management Terminal Approved CMT Customization Management Tool For information CMV Concentrator and Multiplexer for Video Approved CN Change Note For information CNA Common Nozzle Assembly Approved CNCT Connect For information CNCTD Connected For information CNCTN Connection Approved CNCTR Connector Approved CNCTRC Concentric For information CNCV Concave For information CND Conduit For information CNSU Cabin Network Server Unit Approved CNTNR Container Approved CNTOR Contactor Approved CNTR Counter For information CNTRTR Concentrator Approved CNU Cabin Network Unit Approved CO Company For information CO Cut-Off For information CO Carbon Monoxide For information CO2 Carbon Dioxide For information COAS Cabin Operations Applications System Approved COAX Coaxial Approved CoC Centre of Competence For information COC Cabin Operation Center Approved . COC Customer Originated Change Approved CoC P&PM CoC Project & Programme Management For information COCT Cabin Operations Consultation Tool Approved COD/BOD Chemical Oxygen Demand/Biological Oxygen Demand For information CODD Contractual On Dock Date For information CoE Center of Excellence For information C of A Certificate of Airworthiness For information COHO Coherent Oscillator For information COL Column For information COLLI COntour LED LIght For information COM Communication Approved COM Command For information COM Common For information COM Company Organization Manual For information CoMa Configuration Manager For information CombL Combustible Liquid For information COMC CSAS Overheat Monitoring Controller Approved COMDL Coding Module Approved COML Commercial Approved COMO Coordination Memo For information COMP Compass Approved COMP Compensator Approved COMPSN Compensation Approved COMPT Compartment Approved COMPTR Comparator Approved COMTN Commutation For information CoNC Core or Non Core For information COND Condition Approved COND Conditioned Approved COND Conditioning Approved CONDTN Condition For information CONDTR Conditioner Approved CONFIG Configuration Approved CONFIRMD Confirmed Approved CONSUMPT Consumption Approved CONT Continue Approved CONT Continuous Approved CONT Controller Approved CONT Contour For information CONV Converter Approved COO Chief Operating Officer For information COOL Cooler Approved COOL Cooling Approved COOLG Cooling Approved COOLR Cooler Approved COORD Coordination Approved COORD Coordinate For information COPI Copilot For information Cor.M Corrosive Material For information CORA Customer Order Administration For information CORCTD Corrected For information CORR Correct For information CORR Corrugate For information CORR Corrugation For information CO RTE Company Route Approved . Cpk Capability indexes For information CPC Cabin Pressure Controller Approved CPCP Corrosion Prevention and Control program For information CPCS Cabin Pressure Control System Approved CPCU Cabin Pressure Control Unit Approved CPD Continuing Product Development For information CPDLC Controller-Pilot DataLink Communication Approved CPF Central Programme Function For information CPI Cost Performance Index For information CPIF Control Power Intermediate Frequency Approved CPIOM Core Processing Input/Output Module Approved CPL Couple For information CPLD Coupled For information CPLG Coupling Approved CPLR Coupler Approved CPM Critical Path Method For information CPMS Cabin and Passenger Management System Approved CPMU Cabin Passenger Management Unit Approved CPN Corporate Project Number For information CPNY Company Approved CPO Central Programme Organisation For information CPRSR Compressor Approved CPT Capture For information CPT Compartment For information CPT Cure Ply Thickness For information CPU Central Processing Unit Approved CQ Customer Query For information CQC Certification and Qualification Committee For information CR Cold Rolled For information CR Cruise For information CR Change Request For information CRA Cooperation & Research Agreement For information CRC Centralized Radio Control Approved CRC Continuous Repetitive Chime Approved CRC Cyclic Redundancy Check Approved CRC Camera Ready Copy For information CRC Crew Rest Compartment Approved CRC Cyclic Redundancy Code For information CRD Comment Response Document For information CRDC Common Remote Data Concentrator Approved CRE Corrosion-Resistant For information CRES Corrosion-Resistant Steel Approved CRG Cargo Approved CRI Certification Review Item Approved .COS Cowl Opening System Approved COS Cosine For information COSO Committee of Sponsoring Organizations of the Treadway For information Commission COT Cotter For information COTS Commercial Off-The-Shelf Approved COUNT Counter Approved COV Cover For information COWL Cowling Approved CP Clock Pulse For information CP Contributor Package For information CP Control Panel For information Cp. CRK Crank For information CRL Collar For information CRM Communication Router Module Approved CRM Customer Relationship Manager For information CRM Customer Relationship Management For information CROSS Center for Reliable Operational System Security For information CROSSFEEDR Crossfeeder Approved CRP Capacity Requirement Planning For information CRQ Customer Request For information CRR Component Reliability Report For information CRS Course Approved CRS Cold Rolled Steel For information CRS Cost Repercussion Sheet For information CRS Certificate of Release to Service Approved CRS Content Repository Server For information CRSN Corrosion For information CRT Cathode Ray Tube Approved CRU Cabin Router Unit Approved CRU Card Reader Unit Approved CRU Central Refrigeration Unit For information CR VI Hexavalent Chromium For information CRZ Cruise Approved CS Center Spar Approved CS Cabin Cleaners Steps For information CS Call Switch For information CS Certification Specification Approved CS Certifying Staff For information CSAS Cooled Service Air System For information CSAS Conditioned Service Air System Approved CSBS Controllable Sunlight Blocking System Approved CSBSU Controllable Sunlight Blocking System Unit Approved CSC Configured Spare Component For information CSD Constant Speed Drive Approved CSDB Common Source DataBase For information CSDD Common Support Data Dictonary For information CSDM Concession Support Decision Manual For information CSDM Cargo Smoke Detection Module Approved CSE Course Set Error For information CSF/L Continuous Safe Flight/Landing For information CSI Cycles Since Installation For information CSIP Customer Satisfaction Improvement Programme For information CSK Countersink Approved CSKH Countersunk Head For information CSL Console Approved CSM Computer Software Manual For information CSM Commodity Sourcing Manager For information CSM/G Constant Speed Motor/Generator Approved CSN Catalog Sequence Number For information CSPM Customer Support Procedure Manual For information CSR Certificate Signing Request Approved CSS Cockpit System Simulator For information CSS Certification Status Summary For information CST Cabin Service Trainer For information CSTG Casting For information CSTR Constraint Approved CSU Command Sensor Unit Approved . P Central Test Facility Response For information CTF.CSV Cycles Since Last Shop Visit For information CT Current Transformer Approved CT Center Tape For information CT Control Tower For information CTA Control Area For information CTB Center Technology Board For information CTDP Cabin Trainer Data Packages For information CTF Central Test Facilities For information CTF.Current Year For information CYL Cylinder Approved D/A Digital to Analog For information D/D Engine Out Drift Down Point For information .Q Central Test Facility Questions For information CTI Critical Item For information CTK Center Tank Approved CTL Central Approved CTL Control Approved CTL Customer Team Leader For information CTLR Controller Approved CTM Collaborative Team Meeting For information CTO Chief Technology Officer For information CTR Center Approved CTR Contour For information CTR Control Zone For information CTRD Centered For information CTS Customized Technical Specification For information CTS Cabin Temperature Sensor For information CTSK Countersunk For information CTU Cabin Telecommunications Unit Approved CTWT Counterweight For information CU Control Unit Approved CUC Cost Unit Controlling For information CUDU Current Unbalance Detection Unit Approved CUP Customer Package For information CUR Current Approved CV Curriculum Vitae For information CV Cost Variance For information CVE Compliance Verification Engineer For information CVL Control Value List For information CVL Configuration Variation List For information CVM Cabin Video Monitoring Approved CVMS Cabin Video Monitoring System Approved CVR Cockpit Voice Recorder Approved CVRS Cockpit Voice Recorder System Approved CVT Center Vent Tube Approved CVU Crypto Voice Unit Approved CW Clockwise Approved CW Continuous Wave Approved CWG Cockpit Working Group For information CWLU Cabin Wireless LAN Unit Approved CWS Cabin Work Station Approved CWS Control Wheel Steering For information CWSIU Combined Wheel Speed Interface Unit Approved CWY Clearway For information CY Cycle Approved CY Calendar Year . Cabin Configuration Tool Approved DCP Display Control Panel Approved DCR Dock on Crew Rest Approved .D/LNA Diplexer/Low Noise Amplifier Approved D/O Description and Operation For information D&B Design and Build For information D&M Design & Manufacture For information DA Drift Angle Approved DABS Discrete Address Beacon System For information DAC Digital to Analog Converter Approved DAC Drawing Aperture Card Approved DAC Double Annular Combustor For information DACAS Data Centric Authoring System For information DADC Digital Air Data Computer Approved DADS Digital Air Data System For information DAE Designated Airworthiness Engineer For information DAF Damping Augmentation Function For information DaFA Data For Application Approved DAGM Dry Air Generation Module Approved DAGS Dry Air Generation System Approved DAL Development Assurance Level For information DAMP Damping Approved DAMPG Damping Approved DAORD Detailed Airline Operations Requirement Document For information DAR Digital ACMS Recorder Approved DAR Digital AIDS Recorder Approved DARE Development And Ramp-up Excellence For information DAS Development Accomplishement Summary For information DAS/STC Designated Alteration Station/Supplemental Type Certific For information D-ATIS Digital Automatic Terminal Information System Approved DAU Data Acquisition Unit Approved DB Database Approved DB Data Base For information DBAI Design and Build Aircraft Improvement For information DBBS Data Base Bulletin Service For information DBC Data Bus Communication Approved DBCR DataBase Change Request Approved DBD Data Basis for Design For information DBD Data Basis for Design For information DBLR Doubler Approved D-BoM Design-Bill of Materials For information DBPS Display Based Passenger Sign Approved DBTS Data Broadband Transceiver System Approved DC Direct Current Approved DC Direct Cost For information DC Domain Coordinator For information DCC Dispo Cockpit For information DCCT Development Compliance and Certification Test For information DCD Data Control and Display Approved DCD Decode For information DCD Double Channel Duplex For information DCDR Decoder Approved DCDU Datalink Control and Display Unit Approved DCI Design Change Instruction For information DCL Digital Cabin Logbook Approved DCL-CCT Digital Cabin Logbook . DCR Delivery Control Room For information DCR Design Change Request For information DCRC Dock on Crew Rest Compartment Approved DCS Designated Certification Specialist For information DCS Direct Current Supply For information DCS Double Channel Simplex For information DCU Direction Control Unit Approved DCV Directional Control Valve Approved DCVR Direct Current Voltage Ratio For information DD Definition Dossier For information DD Dependence Diagram For information DDA Digital Differential Accumulation For information DDC Definition Dossier Check For information DDCU Dedicated Display and Control Unit For information DDD Detailed Design Dossier For information DDI Design Drawing Instruction For information DDI Documentary Data Insert For information DDM Digital Data Module Approved DDM Difference in Depth of Modulation For information DDP Declaration of Design and Performance Approved DDRMI Digital Distance and Radio Magnetic Indicator Approved DDS Domain Display Switch For information DDS Design Data Set For information DDTS Digital Data Technology Standards For information DDU Delivered Duty Unpaid For information DDV Direct Drive Valve Approved DEC Declination For information DECEL Decelerate Approved DECOMPRESS Decompression Approved DECR Decrease Approved DEDP Data Entry and Display Panel Approved DEF Definition Approved DEFDARS Digital Expandable Flt Data Acquisition & Recording Sys For information DEFL Deflect For information DEFOG Defogging Approved DEFRD Deferred Approved DEFUEL Defueling Approved DEG Degree Approved DEG Direct Entry Graduate For information DEGRADD Degraded Approved DEL Delete Approved DEL Delay Message For information DEL BY Deleted by For information DELTA P Differential Pressure Approved DEM Digital Electronic Module For information DEMOD Demodulator For information DEP Departure Approved DEP Data Entry Panel For information DEPLD Deployed For information DEPRESS Depressurization Approved DEPT Department For information DES Descend Approved DES Descent Approved DES Digital Equipment Simulator For information DEST Destination Approved . DET Detection Approved DET Detector Approved DETECTD Detected Approved DETNG Determining For information DEU Decoder/Encoder Unit Approved DEV Deviation Approved DEVN Deviation For information DEW Delivery Empty Weight For information DEX Access Demanded For information DF Direction Finder Approved DFA Delayed Flaps Approach For information DFCV Dual-Flapper Check Valve Approved DFDAMU Digital Flight Data Acquisition and Management Unit Approved DFDAU Digital Flight Data Acquisition Unit Approved DFDR Digital Flight Data Recorder Approved DFDRS Digital Flight Data Recording System Approved DFIDU Dual Function Interactive Display Unit Approved DFMEA Design Failure Mode & Effect Analysis For information DFPPU Differential Feedback Position Pick-Off Unit Approved DFPRM Duct and Fuel Pipe Repair Manual Approved DFS Detailed Functional Specification For information DFSOV Dual Flow and Shut-Off Valve Approved DFT Drift For information DG Directional Gyro For information DG Dark Green For information DGAC Direction Generale de l'Aviation Civile For information DGI Digital Input Approved DGO Digital Output Approved DGPS Digital Global Positioning System Approved DGTL Digital For information DH Decision Height Approved DI Data Input For information DI Deicing For information DIA Diameter Approved DIAPH Diaphragm For information DIBU Door Illumination Ballast Unit For information DIFF Differential Approved DIM Direction Input Module Approved DIM Dimension For information DIM Dimming For information DIMM Dimmable Approved DIP Dual In-line Package Approved DIP Door Indication Panel Approved DIPLXR Diplexer Approved DIR Direct Approved DIR Direction Approved DIR Director Approved DIR TO Direct to For information DISC Disconnect Approved DISC Disconnected Approved DISC Disconnection Approved DISCH Discharge Approved DISCH Discharged Approved DISCNTY Discontinuity Approved DISCTN Disconnection For information DIS-IN Discrete Input For information . DATA Documentary Data For information DOHS Door Operation Handle Switch For information .DISRMD Disarmed For information DIST Distance Approved DISTR Distribute Approved DISTR Distribution Approved DISTR Distributor Approved DITCH Ditching Approved DITS Digital Information Transfer System Approved DIU Digital Interface Unit Approved DIVERTG Diverting Approved DL Domain Leader For information DL Data Loader For information DLC Direct Lift Control Approved DLCM Data Loading Configuration Manager Approved DLCS Data Loading and Configuration System Approved DLK Data Link Approved DLOAD Data Loading Approved DLRB Data Loading Routing Box Approved DLS Data Loading Selector Approved DLS Data Load System For information DLW Data Loading Workshop For information DLY Delay For information DM Data Module For information DMA Direct Memory Access Approved DMC Display Management Computer Approved DMC Design Modification Committee For information DMC Direct Maintenance Cost For information DMC Data Module Code For information DMD Demand For information DMD Demand Data Sheet For information DMDLTR Demodulator Approved DME Distance Measuring Equipment Approved DMI Design Maturity Item For information DMM Data Memory Module Approved DMP Display Management Processor Approved DMPR Damper Approved DMR Design Material References For information DMS Document Management System For information DMU Data Management Unit Approved DMU Digital Mock-Up For information DMZ DeMilitarized Zone Approved DN Down Approved DN Delivery Note For information DnA Develop new Aircraft For information DnCC Develop new Cabin and Cargo For information DNI Drawing Numerical Index Approved DNLK Downlock Approved DNLKD Downlocked Approved DNLNK Downlink Approved DNW German-Dutch Wind Tunnel For information DO Data Output For information DO Design Office For information DO Design Organization For information DOA Design Organisation Approval For information DOC Direct Operating Cost For information DOC. Up & Downloading For information DRVG Driving Approved DRVN Driven For information DRVR Driver Approved DS Downstream For information DS Design Solution For information DS Design Solution For information DS/C Digital Server/Controller Approved DSAPP Disappearance For information DSB Door Sensor Block Approved DSC Digital Signature Checker Approved DSCRM Discriminator For information DSCRT Discrete Approved DSCS Door and Escape Slide Control System Approved DSCS Door and Slide Control System Approved DSDL Dedicated Serial Data Link Approved DSEB Digital Seat Electronic Box Approved DSENGD Disengaged For information DSG Design Service Goal For information DSI Discrete Input Approved DSIP Door/Slide Indication Panel Approved DSMCU Doors and Slides Management Control Unit Approved DSMS Doors and Slides Management System Approved DSO Discrete Output Approved DSPL Display Approved DSPLYD Displayed Approved DSQR Designated Supplier Quality Representative For information .DOID Design Organisation Interface Document For information DOLLI Dome LED Light Approved DOM Design Organisation Manual For information DOM Document Object Model For information DOORLI Door Light For information DOORS Dynamic Object Orientated Requirements System For information DOR Design Office Responsible For information DOS Design Organisation Signatories For information DOS Design Organisation Signatures For information DOW Dry Operating Weight Approved DP Data Processing For information DP Differential Protection For information DPCU Digital Passenger Control Unit Approved DPDT Double Pole/Double Throw Approved DPI Differential Pressure Indicator Approved DPM Design Progress Meeting For information DPRM Delivery Planning Review Meeting For information DQN Design Query Note For information DR Dead Reckoning Approved DR Door Approved DR Dispatch Reliability For information DR Drill / Drilling / Drills For information DRCR Design Rework Change Request For information DRIP Design Response Intended for Playback For information DRL Documentation Requirement List For information DRM Duct Repair Manual Approved DRMI Distance Radio Magnetic Indicator Approved DRN Drawn by For information DRT Data Replication Tool For information DRUD Data Recording. DSSS Direct Sequence Spread Spectrum For information DSTN Drawing Set Technical Note For information DSTRK Desired Track For information DSUG Drawing Set User Guide For information DtC Design to Cost For information DTD Document Type Definition Approved DTG Distance to Go Approved DTMF Dual Tone Multiple Frequency Approved DTMS Damage Tolerance Monitoring System Approved DTMU Damage Tolerance Monitoring Unit Approved DTR Design Task Responsible For information DTS Duct Temperature Sensor For information DU Display Unit Approved D-ULPA Double Ultra Low Particulate Air Approved DUM Dummy For information DV Design Variant For information DVD Digital Versatile Disk Approved DVD Digital Video Disk For information DVI Digital Visual Interface Approved DVR Digital Video Recorder Approved DWC Drip Water Collector Approved DWG Drawing Approved DWL Dowel / Doweling / To Dowel For information DX Access Demanded For information DYNMTC Dynamometric For information E East Approved E/ECI Electric/Electronic Common Installation Approved E/F Equipment/Furnishings Approved E/T Electrical Trim For information EA Environmental Aspect For information EABDC Enhanced Aircraft Broadcast Data Collector Approved EAC Estimate At Completion For information EADI Electronic Attitude Director Indicator For information EADS European Aeronautic Defence and Space Company For information EAFR Enhanced Airborne Flight Recorder For information EAPAS Enhanced Airworthiness Program for Aeroplane Systems Approved EAROM Electrically Alterable Read Only Memory Approved EAS Equivalent Airspeed For information EASA European Aviation Safety Agency For information EASP Extended Aircraft Systems Perimeter For information EAT Expected Approach Time For information EAT Estimate At Completion For information EAT Engineering Application Toolkit For information EATULC Emergency ATU Line Contactor Approved EBAS Engine Bleed Air System Approved EBATC Emergency Battery Contactor Approved EBCU Emergency Brake Control Unit Approved EBHA Electrical Backup Hydraulic Actuator Approved EBIT Earnings Before Interest and Taxes For information EBITDA Earnings Before Interest. Depreciation and For information Amortisation EBITDAR Earnings Before Interest. Depreciation. For information Amortization and Rent EBS Engine Build Specification For information EBTAC Emergency Bus Tie AC Contactor Approved . Taxes. Tax. EBTC Emergency Bus Tie Contactor Approved EBTDC Emergency Bus Tie DC Contactor Approved EBU Engine Build-up Unit Approved EC Engine Control For information EC Entertainment Controller For information EC Executive Committee For information ECAM Electronic Centralized Aircraft Monitoring Approved ECAM TC ECAM Temporary Change Approved ECAS Emergency Cabin Alerting System Approved ECB Electronic Control Box Approved ECDB Equipment Central Data Bank For information ECLS Electrical Cargo Loading system Approved ECM Engine Condition Monitoring Approved ECM Engineering Coordination Memo For information ECM Equipment Change Management For information ECM EADS Competence Management For information ECM EADS Competence Management For information ECMS Electrical Contactor Management System Approved ECMU Electrical Contactor Management Unit Approved ECN Engineering Change Note Approved E-COMETE Extended COrdination of Maintenance End-to-End For information ECON Economy Approved ECON Economic For information ECP Ecam Control Panel Approved ECS Environmental Control System Approved ECS Electronic Cooling System For information ECSB Embedded Computer System Bus For information ECT ECAM Customization Tool For information ECU Electronic Control Unit Approved ECUCV Electronic Control Unit Cooling Valve Approved ED Edge Distance For information ED Engine Display Approved EDB ECAM Data Book For information EDD Engineering Delivery Documents For information EDD Electrical Data Dossier For information EDD Equipment Definition Dossier For information EDES Equipment Definition Evolution Sheet For information EDIU Electrical Discrete Interface Unit Approved EDMC Engineering Drawing Microfilm Card For information EDMS Engineering Documentation Management Services For information EDMU Electrical Distribution Monitoring Unit Approved EDP Electronic Data Processing For information EDP Engine Driven Pump For information EDR Electrical Design Rules For information EDR Experience Design Requirements For information EDS Electronic Distribution of Software For information EDS Engineering Document System For information EDS Enterprise DMS (Document Management System) For information Solution EDTA Ethylenediamine Tetraacetate For information EE Electrical and Electronic For information EE Electrical Equipment For information EEC Electronic Engine Control Approved EEC Engine Electronic Controller Approved EENMU Emergency Electrical Network Management Unit Approved EEPDC Emergency Electrical Power Distribution Center Approved . EEPMS Emergency Escape Path Marking System For information EEPROM Electrically Erasable Programmable Read Only Memory Approved EF Early Finish Date For information EFB Electronic Flight Bag Approved EFBSA Electronic Flight Bag Software Application For information EFCC Electronic Flight Control Computer Approved EFCC Emergency Flight Control Contactor Approved EFCS Electrical Flight Control System Approved EFCU Electrical Flight Control Unit Approved EFDARS Expandable Flight Data Acquisition and Recording For information Systems EFF Effective Approved EFF Effectivity Approved EFF/FFU Electronic Flight Folder/Flight Follow-Up Approved EFI Experienced Field Investigator For information EFIS Electronic Flight Instrument System Approved EFIS CP EFIS Control Panel For information EFIS SGU EFIS Symbol Generator Unit For information EFOB Estimated Fuel on Board Approved EFPMS Emergency Floor Path Marking System For information EFTA European Free Trade Association For information EGIU Electrical Generation Interface Unit Approved EGL Engineering Group Leader For information EGLC Emergency Generator Line Contactor Approved EGMS Electrical Galley Management System Approved EGP EADS General Procurement For information EGPWM Enhanced Ground Proximity Warning Module Approved EGPWS Enhanced Ground Proximity Warning System For information EGT Exhaust Gas Temperature Approved EHA Electro-Hydrostatic Actuator Approved EHAC Electro-Hydrostatic Actuator Contactor Approved EHC Electrical Heater Controller Approved EHCU Electromechanical Handforce Control Unit Approved EHM Engine Health Monitoring Approved EHS Electrical Heater System Approved EHSI Electronic Horizontal Situation Indicator For information EI Environmental Impact For information EIAS Equipment Impact Assessment Sheet For information EIC Engineering Integration Centre For information EIF Engine Interface Function Approved EIPM Engine Interface Power Management Approved EIPMU Engine Interface Power Management Unit Approved EIRD Equipment Installation Requirement Dossier For information EIS Electronic Instrument System Approved EIS Entry into Service For information EIS Engine Interface System For information EIU Engine Interface Unit Approved EIVMU Engine Interface and Vibration Monitoring Unit Approved EL Electric Approved EL Equipment List For information ELA Electrical Load Analysis Approved ELAC Elevator Aileron Computer Approved ELAN Ethernet Local Area Network Approved ELAPS Elapsed Time For information ELB Electronic Log Book Approved . ELC Electronic Library Computer Approved ELC Emergency Line Contactor Approved ELCO Exterior Lights Controller Approved ELEC Electric Approved ELEC Electrical Approved ELEC Electricity Approved ELEK Electronic Approved ELEKS Electronics For information ELEV Elevation Approved ELEV Elevator Approved ELEVN Elevation Approved ELEVR Elevator Approved ELF Engineering support and data Link Function Approved ELFDB Emergency Light Floor Disconnect Box Approved ELIPS Engineering tooL for In-service Problem Support For information ELM Electrical Load Management Approved ELMF Electrical Load Management Function Approved ELMS Electrical Load Management System Approved ELMU Electrical Load Management Unit Approved ELO Equipment Location Overview For information ELPU Emergency Lightning Protection Unit Approved ELS Electronic Library System Approved ELS Emergency Lighting System For information ELSD Electrical Load Sensing Device Approved ELT Emergency Locator Transmitter Approved ELV Elevation For information EM ElectroMagnet For information EM Engine Manual For information EMC Electromagnetic Compatibility Approved EMCU Electric Motor Control Unit Approved EMDB Electrical Main Data Bank For information EMEL Edge Mounted Emergency Llight Approved EMER Emergency Approved EMI Electromagnetic Interference Approved EMISN Emission Approved EMLS Emergency Lighting System For information EMMA Ergonomie Merkmal Methode Airbus For information EMMAA Extended Management for Maintenance Analysis For information Airplane EMP Empennage For information EMP Electric Motor Pump For information EMR Engineering Management Review For information EMS Equipment Modification Sheet For information EMS Environmental Management System For information EMSP Extended Mechanical Systems Perimeter For information EMU Engine Monitoring Unit Approved EMU Engine Maintenance Unit For information EMWS ElectroMechanical Window Shade Approved EN European Norm For information ENBL Enable For information ENCD Encode For information ENCDR Encoder Approved ENCL Enclosure For information END Endurance Approved ENEC Emergency Normal to Emergency Contactor Approved ENG Engine Approved . E-PRM Engineering Program Review Meeting For information EPROM Erasable Programmable Read Only Memory Approved EPS Extended Preferred Supplier For information EPSU Emergency Power Supply Unit Approved EPU Emergency Power Unit Approved EPU Estimated Position Uncertainty For information EQIR Engineering Query Investigation report For information EQPT Equipment Approved ER Extended Range Approved ER Elevator Rib For information .ENGD Engaged For information ENG OUT Engine Out For information ENGR Engineer For information ENM Electrical Network Management Approved ENMF Electrical Network Management Function Approved ENMS Electrical Network Management System Approved ENMU Electrical Network Management Unit Approved ENP Estimated Normal Payload For information ENRGZ Energize For information ENRM Ethernet Network Router Module Approved ENT Entry For information ENTR Entrance For information ENV Envelope For information ENVMOD Envelope Modulation Approved EO Engine Out Approved EO Engineering Order For information EO Electrical Outlet For information EO ACCEL ALT Engine Out Acceleration Altitude For information EOC Engineering Order Change For information EOP End of Part For information EOS Electronic Overspeed System Approved EOSID Engine Out Standard Instrument Departure Approved EOT End of Tape Approved EO THR RED Engine Out Thrust Reduction Speed For information SPD EoY End of Year For information EP Entry Panel Approved EP Engineering Panel For information EPAC Entity per Aircraft Change For information EPC External Power Contactor Approved EPCU External Power Control Unit Approved EPD Extended Principle Diagram Approved EPDC Electrical Power Distribution Center Approved EPDS Electrical Power Distribution System Approved EPESC Enhanced Passenger Entertainment System Controller Approved EPGS Electrical Power Generation System Approved EPLC External Power Line Contactor Approved EPLD Electronically Programmable Logic Device Approved EPM Engineering Program Manager For information EPPT Electronic Performance For information EPR Engine Pressure Ratio Approved EPR Equipment Problem Report For information EPR Exhaust Pressure Ratio For information EPR.L EPR Latch Approved EPRM.D EPR Descent Approved EPR. ER Engine Run For information ER Error Report For information ERAI Emergency Ram Air Inlet Approved ERECT Erection For information ERG Electromechanical Release Gate Approved ERHC Electrical Routing and Harness Concept For information ERHCD Electrical Routing and Harness Concept Dossier For information ERL Economic Repair Life For information ERM Enterprise Risk Management For information ERMM En Route Moving Map Approved EROM Electronic Readout Machine For information ERP Enhanced Runaway Protection Approved ERR Error For information ERS Embodiment Repercussion Sheet For information ERS Erase For information ERS Erased For information ERU Engine Relay Unit Approved ES Early Start Date For information ESAO Essai Sol Assisté par Ordinateur Approved ESB Electrical System BITE Approved ESB Evaluation Service Bulletin For information ESBF Electrical System BITE Function Approved ESC Escape Approved ESD Electro Sensitive Device For information ESD ElectroStatic Discharge Approved ESD Electronic System Display For information ESD Electrical Schematic Diagram For information ESDB Element Standard Data Bank For information ESDN Extended System/Structure Description Note Approved ESEC Emergency Smoke/Evacuation Contactor Approved ESG Evaluated Service Goal For information ESLB ECAM System Logic Book Approved ESLD ECAM System Logic Data For information ESMKTC Emergency Smoke Tie Contactor Approved ESN Electrical Structure Network Approved ESP Electrical Standard Practices Approved ESPM Electrical Standard Practices Manual Approved ESPU External Sources Protection Unit Approved ESR European Staff Requirement For information ESS Essential Approved ESS Engine Section Stator Approved EST Estimated Approved EST Electronic Support Tools For information ESTAC Emergency Static inverter AC Contactor Approved ESTC Emergency STatic inverter Contactor Approved ESU Ethernet Switch Unit Approved ESWL Equivalent Single Wheel Load For information ET Elapsed Time Approved ETA Estimated Time of Arrival Approved ETACS External and Taxiing Aid Camera System Approved ETC Envelope Temporary Change For information ETC Executive Technical Council (or Committee) For information ETC Estimate To Complete For information ETD Estimated Time of Departure Approved ETDS Engineering Technical Data Service For information ETE Estimated Time En Route Approved . Etiologic Agent For information ETL Engineering Team Leader For information ETLC Emergency TR Line Contactor Approved ETO Estimated Time Over Approved ETOPS Extended Range Operations for Two-Engine Aeroplanes Approved ETP Equal Time Point Approved ETP Equi-Time Point Approved ETR Engineering Template Repository For information ETRAC Electronic Thrust Reverser Actuation Controller Approved ETRAS Electrical Thrust Reverser Actuation System Approved ETS Equipment Technical Specification For information ETSO European Technical Standard Order For information ETT Estimated Time for Takeoff Approved ETW European Transonic Wind Tunnel For information EUAD European Union Airworthiness Directive Approved EULA End User Licence Agreement For information EUPB Electronic Unit Protection Box Approved EUT Equipment Under Test For information EV Electro Valve For information EV Earned Value For information EVAC Evacuate Approved EVAC Evacuation Approved EVM Earned Value Management For information EVMU Engine Vibration Monitoring Unit Approved EWD Engine/Warning Display Approved EWIS Electrical Wiring Interconnection System Approved EWS Electrical Window Shades Approved EWS Electronic Warning System For information EWS Electrical Window Shade Approved EX Example Approved EXC Excitation Approved EXC Excite Approved EXCD Excited For information EXCESS Excessive Approved EXCG Exciting For information EXCHG Exchange Approved EXCHGR Exchanger Approved EXCN Excitation For information EXDLS External Door Locking System Approved EXH Exhaust Approved EXLCO EXterior Light Control Approved ExMR Executive Management Review For information EXP Expansion Approved Expl.ETHNET Ethernet Approved Etio. Explosive For information EXSTG Existing Approved EXT Exterior Approved EXT External Approved EXT Extend For information EXT Extension For information EXTC Extract For information EXTCD Extracted For information EXTCG Extracting For information EXTG Extending For information EXTIG Extinguishing For information .Ag. EXTIN Extinction For information EXTING Extinguish Approved EXTING Extinguisher Approved EXTING Extinguishing Approved EXTIR Extinguisher For information EXTN Extension Approved EXTNDD Extended Approved EXTR Extractor For information EXTR Extrusion For information EXTR Extreme For information EXTRACT Extraction Approved EXTRACT Extractor Approved EXW Ex Works For information EZ Electrical Zero For information F Fuel Approved F Minimum Flap Retract Speed (EFIS) For information F/C First Class Approved F/CTL Flight Controls Approved F/E Flight Engineer For information F/O First Officer Approved F/S Fast/Slow For information F/U Follow-Up For information F/W Failure Warning For information FA Course from a Fixed Waypoint to an Altitude Termination Approved FA Framework Agreement For information FAA Federal Aviation Administration For information FAC Flight Augmentation Computer Approved FACS Flight Augmentation Computer System For information FADEC Full Authority Digital Engine Control Approved FAF Final Approach Fix Approved FAF Forward and Aft Fuselage For information FAI First Article Inspection For information FAIL Failed Approved FAIL Failure Approved FAIR Fairing For information FAIR Forum with Airlines for Interactive Resolution For information FAL Final Assembly Line For information FALC Final Assembly Line China For information FALH Final Assembly Line Holder For information FANS Future Air Navigation System Approved FAOM Flight Attendant Operating Manual For information FAP Flight Attendant Panel Approved FAP Forward Attendant Panel Approved FAR Federal Aviation Regulations Approved FAS Flight Augmentation System Approved FAS Fatigue Approval Sheet For information FAV Fan Air Valve Approved FAWP Final Approach Waypoint For information FBB Fasten Bed Belt Approved FBS Fixed Base Simulator For information FBW Fly-by-wire For information FC Course from a Fixed Waypoint to a Changeover Point Approved FC Fully Closed Approved FC Flight Cycle For information FC Freight Container Train For information . FC Failure Condition For information FCA Free Carrier For information FCAC Final Cost of Aircraft For information FCC Flight Control Computer Approved FCC Flight Control Contactor Approved FCCS Flight Control Computer System For information FCCU Flight Control Computer Unit For information FCD Full Color Display For information FCD55 Full Color Display 5 inch x 5 inch For information FCDC Flight Control Data Concentrator Approved FCGS Flight Control and Guidance System Approved FCGU Flight Control and Guidance Unit Approved FCMC Fuel Control and Monitoring Computer Approved FCMS Fuel Control Monitoring System Approved FCO Fulfill Customer Order For information FCOM Flight Crew Operating Manual Approved FCP Full Change Process For information FCPC Flight Control Primary Computer Approved FCPI Flight Control Position Indicator For information FCR Flight Crew Report For information FCRC Flight Crew Rest Compartment Approved FCRM Flight Control Remote Module Approved FCSC Flight Control Secondary Computer Approved FCST Forecast For information FCTM Flight Crew Training Manual Approved FCTN Function For information FCU Flight Control Unit Approved FCU Fuel Control Unit Approved FCU Flush Control Unit For information FCV Flow Control Valve Approved FD Course from a Fixed Waypoint to a DME Distance Approved FD Flight Director Approved FD Fuselage Datum Approved FD Functional Diagram For information FDA First Design Acceptance For information FDAC Full Digital AGU Controller Approved FDAU Flight Data Acquisition Unit Approved FDB Floor Disconnect Box Approved FDBK Feedback Approved FDC Fuel Data Concentrator Approved FDCE Flight Deck and Cabin Effects Approved FDD Floppy Disk Drive Approved FDD Functional Description Document For information FDE Flight Deck Effect Approved FDEP Flight Data Entry Panel Approved FDIAF Flight Data Interface/Acquisition Function Approved FDIF Flight Data Interface Function Approved FDIMU Flight Data Interface and Management Unit Approved FDIU Flight Data Interface Unit Approved FDR Flight Data Recorder Approved FDR First Delivery Review For information FDRPL Flight Data Recording Parameter Library For information FDRS Flight Data Recording System Approved FDS Fault Detection Specification For information FDSU Flight Data Storage Unit For information FDU Fire Detection Unit Approved . FE Flight Envelope Approved FEA Finite Element Analysis For information FEC Flight Envelope Computer For information FEC Failure Effect Category For information FEDC Fire Extinguishing Data Converter Approved FEDR Feeder Approved FEGV Fan Exit Guide Vane Approved FE-KB Functional Effects .linked to Troubleshooting Procedure For information FEW Fleet Empty Weight For information FF Fuel Flow Approved FF Ferry Flight For information FF Functional Failure For information FFA Functional Failure Analysis For information FFAR First Flight Article Review For information FFCC Forward Facing Crew Cockpit Concept For information FFCC Forward Facing Crew Cockpit Configuration For information FFCCV Fan Frame Compressor Case Vertical Approved FFCCV Forward Flange Compressor Casing Vibration Approved FFCM Free Fall Control Module Approved FFL Flip Flop Latch For information FFO Funds From Operations For information FFP Fixed Firm Price For information FFS Full Feasibility Study For information FFS Full Flight Simulator For information FFS Front Secondary Structure Approved FFSU Fixed Frequency Supply Unit Approved FG Flight Guidance Approved F-G/S FLS Glide Slope Approved FGE Flight Guidance and Envelope Approved FGES Flight Guidance and Envelope System Approved FGN Foreign For information FGS Flight Guidance System For information FH Flight Hours Approved FHA Functional Hazard Assessment For information FHC Filled Hole Compressive Strength For information FHM Flight ops HMI manager For information FHS Flight Hour Service For information FHSS Frequency Hopping Spread Spectrum For information FIB Functional Integration Bench For information FIC Function Integrated Center For information FIDS Fault Isolation and Detection System Approved FIFO First Input/First Output Approved FIFO First In First Out For information FIG Figure Approved FIH FAL Installed Harness For information FIL Filament For information FIL Fillet For information FILG Filling Approved FIL H Fillister Head For information FIM Fault Isolation Manual Approved FIN Functional Item Number Approved FIR Full Indicator Reading For information .Knowledge Base For information FES Fire Extinguishing System Approved FET Field Effect Transistor For information FE-TP Functional Effects . L Flammable Liquid For information Fla.G Flammable Compressed Gas For information Fla.S Flammable Solid For information FLC Feel and Limitation Computer For information FLD Field Approved FLDK Flight Deck For information FLE Fixed Leading Edge Approved FLEX Flexible Approved FLG Flange For information FLH Flat Head For information FLIP Flight Plan Computation Program For information FLLT Flashing Light For information FLMPRF Flameproof For information F-LOC FLS Localizer Approved FLP Flap Approved FLP Flight Line Planning For information FLR Floor Approved FLS FMS Landing System Approved FLS Field Loadable Software For information FLSA Fuel Level Sensing Amplifier For information FLSAP Field Loadable Software Aircraft Part For information FLSCU Fuel Level Sensing Control Unit Approved FLS R Field Loadable Software Repository For information FLSWT Filton Low Speed Wind Tunnel For information FLT Flight Approved FLTR Filter Approved FLXTO Flexible Take-Off Approved FM Course from a Fixed Waypoint with a Manual Approved Termination FM Flight Management Approved FM Flight Manual Approved FM Frequency Modulation Approved FM Fan Marker For information FMA Flight Mode Annunciator Approved FMC Flight Management Computer Approved FMC Fault Message Code For information FMCS Flight Management Computer System Approved FMCU Flight Management Computer Unit For information FMD Failure Message Description For information FME Flow Metering Equipment Approved FMEA Failure Mode & Effects Analysis Approved FMES Failure Mode and Effects Summary For information FMGC Flight Management and Guidance Computer Approved FMGEC Flight Management Guidance and Envelope Computer Approved FMGES Flight Management Guidance and Envelope System Approved FMGS Flight Management and Guidance System Approved FMS Flight Management System Approved FMS Fuel Manifold Staging For information FMU Fuel Metering Unit Approved .FIS Flight Information Services Approved FIX Fixed Approved FL Flight Level Approved FL Flood For information FL Floor For information FL Flow For information FL Fluid For information Fla. FMV Fuel Metering Valve Approved FNA Final Approach For information FNCP Flight Navigation Control Panel Approved FNL Final Approved FNSG Flight Navigation Symbol Generator Approved FO Fully Open Approved FO Flight Order For information FOAM Flight Ops Application Manager For information FOB Fuel On Board Approved FOB Free On Board For information FOC Fuel/Oil Cooler Approved FOCT Flight Operations Consultation Tool Approved FOD Foreign Object Damage Approved FOD Fuel Over Destination For information FOD Flight Operation Domain For information FODR Flight Operations Documents Repository For information FOHE Fuel/Oil Heat Exchanger Approved FOM Flight Operations Manual For information FOM Flight Operations Monitoring For information FOM Functional Organization Manual For information FOQA Flight Operations Quality Assurance For information FOS Fuel Operator Station Approved FOS Flight Operations Software For information FOSP Flight Operations Standard Package For information FOT FAL Operational Test Meeting For information FOT Flight Operations Telex Approved FOT Flight Operations Transmissions For information FOVE Flight Operations Versatile Environment Approved FPA Flight Path Angle Approved FPEEPMS Floor Proximity Emergency Escape Path Marking System Approved FPF Fire Protection Function Approved FPH Floor Panel Heating Approved FPL Flight Plan For information F-PLAN Flight Plan For information F-PLN Flight Plan Approved FPMU Fuel Properties Measurement Unit Approved FPO Future Projects Office For information FPPU Feedback Position Pick-off Unit Approved FPR Function Portal Representative For information FPRM Fuel Pipe Repair Manual Approved FPS Fire Protection System Approved FPT Flight Path Target Approved FPV Flight Path Vector Approved FQ Fuel Quantity Approved FQDC Fuel Quantity Data Concentrator Approved FQI Fuel Quantity Indicating/Indication/Indicator Approved FQIC Fuel Quantity Indication Computer Approved FQMS Fuel Quantity and Management System Approved FR Frame Approved FRD Functional Requirement Document For information FREQ Frequency Approved FREX Support Repercussion Sheet For information FRM Fault Reporting Manual Approved FRNTR Frontier For information FRQ Frequency For information . FRS Flammability Reduction System Approved FRS False Rear Spar For information FRT Front For information FRU Frequency Reference Unit Approved FRV Fuel Return Valve Approved FS Front Spar Approved FS Fuselage Station For information FS Factor of Safety For information FSA FlySmart with Airbus Approved FSA Flight Safety Advisor to Chief Engineer For information FSA-NG FlySmart with Airbus-New Generation Approved FSAT Functional Software Acceptance Test For information FSB Fasten Seat Belts Approved FSB Flight Safety Board For information FSCM Federal Supply Code for Manufacturers Approved FSD Final Submission Date For information FSI Functional Standard Item For information FSM Field Service Manager For information FSN Fleet Serial Number Approved FSOV Fire ShutOff Valve Approved FSR Field Service Representative For information FST Fire/Smoke/Toxicity For information FSTNR Fastener For information FT Flight Test For information FTA Flight Test Analysis For information FTA Fault Tree Analysis For information FTAC Fuel Tank Access Cover For information FTB For the time being For information FTB Flying Test Bed For information FTD Flight Training Device For information FTDR Flight Test Data Request For information FTE Flight Test Engineer For information FTE Full-Time Equivalent For information FTE Fixed Trailing Edge Approved FTG Fitting Approved FTG Flight Test Guide For information FTI Flight Test Installation Approved FTIS Fuel Tank Inerting System Approved FTK Fuel Tank For information FTMS Flight Test Management System For information FTO Flight Training Organization For information FTP File Transfer Protocol For information FTR Flight Test Request For information FTRNG Feathering For information FTS Frame Time Select For information FTSP Floor Temperature Setting Panel Approved FTU Force Transducer Unit Approved FU Fuel Used Approved FU Feedback Unit For information FUSLG Fuselage Approved FV Flux Valve For information FW Failure Warning Approved FW Firewall For information FWC Flight Warning Computer Approved FWD Forward Approved FWL Firewall Approved . FWPS Functional Workpackage Specification For information FWS Flight Warning System Approved FWSD Flight Warning and System Display For information FY Fiscal Year For information G Green Approved G Galley For information G Grid For information G Gyro For information G/A Ground-to-Air For information G/G Ground Guidance For information G/S Glide Slope Approved GA Go-Around Approved GA General Application For information GAAP Generally Accepted Accounting Principles For information GAC Guide Arm Cover For information GAD General Assembly Drawing Approved GAHMM Global Aircraft Health Monitoring and Management For information GAIN Electrical GAlley INsert equipment Approved GAIR General Assembly Inspection Report Approved GALV Galvanize For information GALY Galley Approved GAM Global Architecture MockUp For information GAMMA-A Slope For information GAMMA-T Potential Slope For information GAMS Ground Asynchronous Messaging Service For information GANA Guidelines for Airframer Network Applications For information GAPCU Ground and Auxiliary Power Control Unit Approved GATE Glossary of Airbus Terms and Expressions For information GATT General Agreement on Tariffs and Trade For information GC General Cargo For information GCA Ground-Controlled Approach System For information GCP General Conditions of Purchase For information GCR Generator Control Relay Approved GCS Global Communication Suite Approved GCU Generator Control Unit Approved GCU Ground Cooling Unit For information GDE Guide Approved GDNC Guidance Approved GDO Ground Door Opening Approved GDS GSE Data Sheet For information GE General Electric Approved GEF GEneric Files For information GEM Ground Equipment Manual Approved GEN Generator Approved GENL General For information GENPN GENerate Part Number For information GES Ground Earth Station Approved GFE Government Furnished Equipment Approved GFI Ground Fault Interruption Approved GFLI Ground Fuel Level Indication Approved GFR Ground Fault Report Approved GFRP Glass Fiber Reinforced Plastic Approved GFTM General Familiarization Training Manual For information GGA Automatic Generic Groups For information GGBU Gear Guard Battery Unit Approved GGMU Gear Guard Main Unit Approved . GGPCU Generator and Ground Power Control Unit Approved GGSU Gear Guard Sensor Unit Approved GIC General Instruction Card For information GIDOCA Gestion Informatique de la Documentation Avion For information GIE Groupement d'Intérêt Economique For information GIFAS Groupement des Industries Francaises Aeronautiques et For information Spatiales GIM General Introduction Manual For information GIN Global Innovation Network For information GIP Global Integration Process For information GIPSY General Integrated Publication System For information GLA Gust Load Alleviation Approved GLA Green Light for Application For information GLASU Galley Light Attendant Service Unit Approved GLC Generator Line Contactor Approved GLF Green Light for Flight For information GLL Green Light for Lab For information GLM General List of Modifications For information GLR Generator Line Relay Approved GLS GNSS Landing System Approved GLT Ground Leak Test Approved GMC General Modification Committee For information GMF General Market Freighter For information GMF Global Market Forecast For information GMR Ground Movement Radar For information GMT Greenwich Mean Time Approved GMTBF Guaranteed Mean Time Between Failure For information GNC Galley Network Controller Approved GND Ground Approved GNLU GNSS Navigation and Landing Unit Approved GNSS Global Navigation Satellite System Approved GOH Geräte-Organisations-Handbuch For information GP Glide Path For information GP Group Approved GPCM Generation Pack and Coordination Memorandum For information GPCU Ground Power Control Unit Approved GPIRS Global Positioning and Inertial Reference System Approved GPM General Processing Module Approved GPP Generic Project Process For information GPRS General Packet Radio Service Approved GPS Global Positioning System Approved GPSSU Global Positioning System Sensor Unit Approved GPT Ground Programming Tool Approved GPU Ground Power Unit Approved GPWC Ground Proximity Warning Computer Approved GPWS Ground Proximity Warning System Approved GR Gear For information GR Goods Received For information GR Gate Review For information GRC Glass Reinforced Composite For information GRESS General Requirements for Equipment and System For information Suppliers GRFC Global RFC For information GRM Geometrical Reference Model For information GRP Geographic Reference Point Approved GRP Glass-Reinforced Plastic Approved . GRP Ground Reference Point For information GRP Ground/Geographical Reference Point For information GRU Ground Refrigeration Unit Approved GRV Groove For information GRVTY Gravity Approved GS Ground Speed Approved GSA Ground Service Application For information GSAC Groupement pour la Sécurité Aviation Civile For information GSB Ground Service Bus Approved GSE Ground Support Equipment Approved GSHLD Glareshield Approved GSM Global System for Mobile Communication Approved GSM General Structure Manual For information GSP Ground Service Panel Approved GSR Global Safety Risk For information GTA General Terms Agreement For information GTHRG Gathering For information GTI Ground Test Instructions Approved GTR Ground Test Requirements For information GUI Graphic Interface Unit For information GUI Graphical User Interface Approved GVI General Visual Inspection Approved GW Gross Weight Approved GWDU Galley Waste Disposal Unit Approved GWR General Working Rules Approved GY Grey For information GYRO Gyroscope Approved H Hot (Electrical Point) For information H Runway Thickness For information H/W Hardware Approved HA Holding Pattern to an Altitude Termination Approved HACCP Hazard Analysis Critical Control Point For information HADC Hybrid Air Data Computer For information HAN Hardware Assurance Nominee For information HARN Harness Approved HAS Heading and Attitude System For information HCS Humidification Control System Approved HCU Head Up Combiner Unit Approved HCU Hydraulic Control Unit Approved HD Head For information HD Hold For information HDDA Hard Disk Drive Array Approved HDG Heading Approved HDG/S Heading Selected Approved HDL Handle Approved HDLG Handling Approved HDM HSDU Data Module Approved HDO Head of the Design Organization For information HDST Headset Approved HDWHL Handwheel Approved HE Human Error For information HEA Human Error Analysis For information HEATG Heating Approved HEGS Hydraulic Electrical Generating System Approved HEMEA Human Error Modes and Effect Analysis For information HEPA High Efficiency Particulate Air Approved . HERTO High Energy Rejected Takeoff Approved HES Head-End Switch Approved HES Head End Server Approved HESU Head-End Server Unit Approved HEX Hexadecimal For information HF High Frequency Approved HF Holding Pattern to a Fixed Waypoint Approved HF Human Factors For information HFDR High Frequency Data Radio Approved HFEC High Frequency Eddy Current Approved HFP Heated Floor Panel Approved HGA High Gain Antenna Approved HHL Horizontal Hinge Line For information HHT Hand-Held Tester For information HHX Hydraulic Heat Exchanger Approved HI High Approved HIBU Hybrid Illumination Ballast Unit For information HID High Intensity Discharge Approved HIDS Host Intrusion Detection System Approved HIL Hold Item List For information HK Knoop Hardness Test Value For information HL High Level Approved HLAC High Level AC Voltage For information HLCL Helical For information HLD High Power Amplifier/Low Noise Amplifier/Diplexer Approved HLD Hold Approved HLDC High Level DC Voltage For information HLDR Holder Approved HLTY Healthy Approved HLVVO High Level V&V Objective For information HM Holding Pattern with a Manual Termination Approved HMC Hydromechanical Control Approved HMC Hydraulic Monitoring and Control Approved HMCA Hydraulic Monitoring and Control Application Approved HMCRF Hydraulic Monitoring and Control Remote Function Approved HMDU Hatrack-Mounted Display Unit For information HMG Harmonized Material Group For information HMI Human-Machine Interface Approved HMU Hydromechanical Metering Unit Approved HMU Hydromechanical Unit Approved H NAV Horizontal Navigation For information HNG Hinge For information Ho Head of For information HO HandOver For information HoE Head of Engineering For information HOLD Holding For information HOR Hold Open Rod Approved HORIZ Horizontal For information HOT High Oil Temperature Approved HoV Head of Version For information HOV Head Of Version For information HP High Pressure Approved HPA High Power Amplifier Approved HPC High Pressure Compressor Approved HPC Rear Compressor Rotor and Stator Assembly For information HPP Hardware Pin Programming Approved . Finding Station For information HVPS High Voltage Power Supply Approved HWBPT Hardware Breakpoint For information HYD Hydraulic Approved HZ Hertz For information I Inertial For information I Invoice Card For information I/F Interface For information I/I Inspection/Interval For information I/O Input/Output Approved I/P Input Approved I/P Intercept Point Approved .HPR High Power Relay Approved HPT High Pressure Turbine Approved HPT Rear Compressor Drive Turbine Rotor Assembly For information HPTACC High Pressure Turbine Active Clearance Control Approved HPTC High Pressure Turbine Clearance Approved HPTCC High Pressure Turbine Case Cooling Approved HPTCC High Pressure Turbine Clearance Control Approved HPTR High Pressure Turbine Rotor Approved HPU Head up Projection Unit Approved HPV HP Bleed Valve Approved HPV High Pressure Valve For information HR Hot Rolled For information HR Hour For information HR Human Resources For information HR Human Reliability For information HRBP Human Resources Business Partner For information HRD HMI Requirement Document For information HRP Horizontal Reference Plane Approved HRS Hot Rolled Steel For information HRS Hours For information HS High Speed Approved HSD High Speed Data Approved HSDU High Speed Data Unit Approved HSG Housing For information HSI Horizontal Situation Indicator Approved HSI Hot Section Inspection For information HSMU Hydraulic System Monitoring Unit Approved HSMU Hydraulic System Management Unit Approved HSS High Speed Steel For information HSU HUD Sunvisor Unit Approved HT Heat For information HTD Heated For information HTG Heating Approved HTML Hyper Text Mark-up Language For information HTP Horizontal Tail Plane For information HTR Heater Approved HTTP HyperText Transfer Protocol For information HT TR Heat Treat For information HUD Head-Up Display Approved HUDC Head Up Display Computer Approved HUMIDIF Humidification Approved HV High Voltage Approved HV Vickers Hardness Test Value For information HVDF High and Very High Frequency Direction . Activity.I/P Intercept Profile Approved IAE International Aero Engines Approved IAF Initial Approach Fix Approved IAS Indicated Airspeed Approved IAS International accounting standards For information IATA International Air Transport Association For information IATP International Air Transport Pool For information IAW In Accordance with For information IAWP Initial Approach Waypoint For information IBIT Initiated BITE Approved IBLC Inter-Bus Line Contactor Approved IBN Identification Beacon For information IBU Integrated Ballast Unit For information IC Integrated Circuit For information IC Invoice Control Card For information ICA Instructions for Continued Airworthiness Approved ICAO International Civil Aviation Organisation For information ICARE Illustration. Entity For information ICC Integrated Change Control For information ICC International Chamber of Commerce For information ICC Integrated Configuration Control For information ICCAIA Inter Co-ordinating Council of Aerospace Industries For information Association ICCB ISMD Change Control Board For information ICD Interface Control Document Approved ICE In Circuit Emulation For information ICP Integrated Control Panel Approved ICPS Integrated Control Panel System Approved ICS Independent Check Sheet For information ICS Interior Color Specification For information ICT Information & Communication Technology For information ICU Isolation Control Unit Approved ICU IGGS Controller Unit Approved ICY Interchangeability Approved ID Inside Diameter Approved ID Identification Approved IDBT Integrated Design and Build Team For information IDC Instrument Display Catalog For information IDENT Identification Approved IDENT Identifier Approved IDENT Identify Approved IDG Integrated Drive Generator Approved IDLS Internal Door Locking System Approved IDM Impact Drawing Management For information IDOLS In-service Data tools For information IDP Integrated Data Processing For information ID PL Identification Plate For information IDS Intrusion Detection System For information IDU Interactive Display Unit Approved IEC International Electrotechnical Commission For information IECHA Intrinsic/Environmental Conditions Hazard Analysis For information IEEE Institute of Electrical and Electronic Engineers For information IES Industrial Evaluation Sheet For information IETF Internet Engineering Task Force For information IF Initial Fix Approved IF Intermediate Frequency For information . Constraint. Rule. IFA Integrated Final Assembly For information IFA International Federation of Airworthiness For information IFE In-Flight Entertainment Approved IFEC In-Flight Entertainment Center Approved IFES In-Flight Entertainment System For information IFP In-Flight Performance Computation Program For information IFPA InFlight Performance Application Approved IFR Instrument Flight Rules Approved IFRS International financial reporting standards For information IFSD In-Flight Shut Down For information IFTB In flight Turn back For information IGA Intermediate Gain Antenna Approved IGB Inlet Gear Box Approved IGDS Inert Gas Distribution System Approved IGGS Inert Gas Generation System Approved IGN Ignition Approved IGSC Inert Gas System Control Approved IGV Inlet Guide Vane Approved IHA Intrinsic Hazard Analysis For information IIPD Illustrated Initial Provisioning Document For information ILF Integrated Loading Facilities For information ILLUM Illumination Approved ILLUMD Illuminated For information ILS Instrument Landing System Approved IM Inner Marker Approved IMA Integrated Modular Avionics Approved IMACS Information Management Aircraft-ground Communication Approved System IMC Indirect Maintenance Cost For information IMCC Information Management Common Cabinet Approved IME Integrated Maintenance Extract For information IML Integration Maintenance Load Approved IMM Immediate Approved IMPACT Improvement Manufacturer Program for Airbus Customer For information Training IMR Interlock Monitoring Relay Approved IMRBP International MRB Policy Board For information IMU Inertial Measurement Unit Approved INA Initial Approach For information INB Inbound Approved INBD Inboard Approved INCLG Including For information INCR Increment Approved INCR Increase For information IND Indicator Approved INDG Indicating Approved INFO Information Approved INHI Inhibit For information INHIB Inhibit Approved INHIB Inhibited Approved INHIB Inhibition Approved INIT Initial Approved INIT Initialization Approved INOP Inoperative Approved INP Input For information INR Inner Approved . INRTL Inertial Approved INS Inertial Navigation System Approved INSP Inspection For information INST Instinctive Approved INST Instrument Approved INSTL Installation Approved INSTLLD Installed For information INSTM Instrumentation For information INSUL Insulate Approved INSUL Insulation Approved INSUL Insulator Approved INT Interior Approved INT Interrupt For information INT Intersection For information INTA Instituto Nacional de Técnica Aeroespacial For information INTCON Interconnection For information INTCP Intercept Approved INTEG Integral Approved INTEG Integrally Approved INTEN Intensity For information INTERCOM Intercommunication Approved INTFC Interface Approved INTG Integral For information INTGT Integrate For information INTGT Integrating For information INTL Internal Approved INTLK Interlock Approved INTMD Intermediate Approved INTMT Intermittent Approved INTPH Interphone Approved INTR Interior For information INTRG Interrogate Approved INTRG Interrogator Approved INTRPT Interrupt Approved INU Inertial Navigation Unit For information INV Inverter Approved INWP Intermediate Waypoint For information IOC Indirect Operating Cost For information IOE Initial Operating Experience For information IOM Input/Output Module Approved ION Innovations. Operations and Networks For information IOR Immediate Operational Requirement For information IORS Internal Occurrence Reporting System For information IP Intermediate Pressure Approved IP Initial Provisioning For information IP Internet Protocol For information IP Invoice Packing Card For information IP Interested Party For information IP Intellectual Property For information IPA Industrial Process Assessment For information IPC Illustrated Parts Catalog Approved IPC Intermediate Pressure Bleed Check Valve For information IPCA Industrial Process Control Assessment For information IPCA Industrial Process Capability Assessment For information IPCC Intergovernmental Panel on Climate Change For information IPCT Initial Provisioning Coordination Team For information . For information disciplinary Integration ISB Inter-System Bus For information ISB Inspection Service Bulletin Approved ISC Industry Steering Committee For information ISCD Inter System Communication Data For information ISD Inadvertent Slide Deployment For information ISDN Integrated Services Data Network Approved ISDN Information System Data Network For information ISDN Integrated Services Digital Network Approved ISDU Inertial Sensor Display Unit (IRS) For information ISG Instrument Symbol Generator Unit For information ISG Integrated Starter Generator For information ISG Intermediate Service Goal For information ISIS Integrated Standby Instrument System Approved ISM Illumination Sensor Module Approved .IPCU Ice Protection Control Unit Approved IPCV Intermediate Pressure Check Valve Approved IPD Illustrated Provisioning Document For information IPD Initial Provisioning Data For information IPDU Ice Protection Data Unit Approved IPEG International Research & Technology Partnerships For information Exchange Group IPL Illustrated Parts List For information IPMA International Project Management Association For information IPO Initial Public stock Offering For information IPO Initial Public Offering For information IPP Integrated Production Programme For information IPPU Instrumentation Position Pick-off Unit Approved IPR Intellectual Property Rights For information IPRAM Integrated Prerecorded Announcement Module Approved IPS Incorrect Phase Sequence For information IPSM Intelligent Power Supply Module Approved IPT Inadvertent Power Transfer For information IPT Integrated Production Team For information IPTCC Intermediate Pressure Turbine Case Cooling Approved IPV Indicator Para Visual For information IQP Integrated Quality Plan For information IR Inertial Reference Approved IR Implementing Rules For information IRAN Inspection and Repair As Necessary For information IRD Integrated Receiver Decoder Approved IRDC Interface Remote Data Concentrator Approved IRDM Integrated Receiver Decoder Module Approved IRL Integration Readiness Level For information IRP Integrated Refuel Panel Approved IRQ Interrupt Request For information IRR Internal Rate of Return For information Irr.M Irritating Material For information IRS Inertial Reference System Approved IRS Inspection Report System For information IRU Inertial Reference Unit For information IS Information Systems For information IS Information System For information ISA International Standard Atmosphere Approved ISA Inertial Sensor Assembly For information ISAMI Improvement of Structure Analysis through Multi. ISM International Supply Chain Manager For information ISMD Inter System Maintenance Data For information ISO International Standardization Organization Approved ISO In-Service Occurrence For information ISOEG In-Service Operations Evaluation Group For information ISOL Isolation Approved ISP Integrated Static Probe Approved ISP In-Service Problem For information ISPL IS Project Leader For information ISPSS In-Seat Power Supply System Approved ISPSU In-Seat Power Supply Unit Approved ISPU In-Seat Power Supply Unit For information ISR Information System Representative For information ISRO In-Service Reportable Occurrence For information ISS Inertial Sensor System For information ISU Inertial Sensor Unit For information ISWL Isolated Single Wheel Load For information IT Interruption For information IT Information Technology For information ITCM Initial Technical Coordination Meeting For information ITCT ISMD Templates Check Tool For information ITH Intake Housing For information ITP Intention To Proceed For information ITP In-Trail Procedure Approved ITR Integration Test Request For information ITS Internal Technical Specification For information IV Isolation Valve Approved IVASEB Integrated Video and Audio Seat Electronic Box Approved IVCP Integrated Value Creation Project For information IVMS Internal Video Monitoring System For information IVP Integrated Version Planning For information IVS Inertial Vertical Speed Approved IW Innovation Works For information JAA Joint Aviation Authorities For information JAM Jammed Approved JAM Jamming Approved JAMG Jamming For information JAR Joint Aviation Requirements Approved JB Junction Box For information JCP Joint Change Process For information JCR Joint Change Request For information JCT Junction For information JEMTOSS Jet Engine Maintenance Task Oriented Support System For information JEP Jeppesen Approved JFGW Jettison Final Gross Weight Approved JIC Job Instruction Card For information JID Jeppesen Inflight Database Approved JIT Just In Time For information JITX Jeppesen Integrated Tool Kit X Approved JK Jack For information JLS Jack Level System For information JOEB Joint Operation Evaluation Board For information JOG Joggle For information JTSN Jettison Approved JUNCTN Junction Approved . JV Joint Venture For information K Degrees Kelvin For information K K For information K Subgrade Reaction Modulus For information KA Knowledge Acquisition For information KAM Key Account Manager For information KB/s Kilo Bits per Second For information KBD Keyboard Approved KBE Knowledge Based Engineering For information KCCU Keyboard and Cursor Control Unit Approved KDMS Kongsberg Data Manufacturing System For information KE Knowledge Engineering For information KFS Kaspersky File System Approved KIMS Kongsberg Integrated Management System For information KM Knowledge Management For information KOR Kick Off Review For information KPI Key Performance Indicator For information KPP Key Process Parameter Approved KRUG Krueger For information KSA Key Stage Assessment For information KU Keyboard Unit Approved L Left Approved L Length Approved L/G Landing Gear Approved L/HIRF Lightning/High Intensity Radiated Fields Approved LA Linear Accelerometer Approved LAF Load Alleviation Function Approved LAG Lagging For information LAILA LAvatory Interface and Light Adapter Approved LAM Laminate For information LAMM Lights. Audio and Miscellaneous Module For information LAN Local Area Network Approved LAND Landing For information LAP List of Applicable Publications For information LAR List of Applicable Rules For information LAT Lateral Approved LAT Latitude Approved LATC Live Animal Transportation Calculation For information LATD List of Applicable Technical Documents For information LAU Linear Accelerometer Unit For information LAV Lavatory Approved LAYT Layout For information LBA Logical Bus Application Approved LBA Luftfahrt Bundes Amt For information LBC Local Booking Code For information LBIP Lifecycle for Business Improvement Projects For information LBOM Logistic Bill of Material For information LBP Left Bottom Plug Approved LC Line Contactor Approved LC Labour Cost For information LC Logistic Conditions For information LCC Life Cycle Cost For information LCD Liquid Crystal Display Approved LCDT Load Compressor Discharge Temperature Approved LCF Left Center Fuselage For information LCH Latch Approved . LCHG Latching For information LCIT Load Compressor Inlet Temperature Approved LCL Line Check List (Maintenance) For information LCN Load Classification Number Approved LCP Local Control Panel Approved LCSD Line Check Support Data For information LCT Locate / Location / To Locate For information LCTR Locator Approved LD Lower Deck Approved LD Left Display For information LD Load For information LDA Localizer-type Directional Aid For information LDA Laser Doppler Anemometry For information LDC Local Door Controller Approved LDC Local Domain Coordinator For information LD CAB Lower Deck Cabin Approved LDCC Lower Deck Cargo Compartment Approved LDCD Lower Deck Cargo Door For information LDF Lower Deck Facilities Approved LDG Landing Approved LD GALY Lower Deck Galley Approved LDG GR Landing Gear For information LDI Landing Direction Indicator For information LD LAV Lower Deck Lavatory Approved LDM Loads Dispatch Manager For information LDMCR Lower Deck Mobile Crew Rest Approved LDPA LanDing Performance Application Approved LDS Laptop Docking Station Approved LDS Load Delivery Service For information LDSF Lower Deck Surveillance Function Approved LE Leading Edge Approved LE Log Entry For information LEAU Large Environment Accelerometer Unit For information LED Light Emitting Diode Approved LEHGS Local Electro-Hydraulic Generation System Approved LEL Lower Explosive Limit For information LEO Little Earth Orbit Approved LEP List of Effective Pages For information LER Leading Edge Rib Approved LETD List of Effective Technical Data For information LF Low Frequency For information LF Late Finish Date For information LFR Low Frequency Radio Range For information LG Light Green For information LGA Low Gain Antenna Approved LGB Landing Gear Bay For information LGCIS Landing Gear Control Indication System Approved LGCIU Landing Gear Control and Interface Unit Approved LGCM Light Green Communication Manager Approved LGERS Landing Gear Extension and Retraction System Approved LGL LED Gobo Light For information LGMS Landing Gear Management System Approved LGMS Landing Gear Monitoring System Approved LGND Legend For information LGRDC Landing gear Remote Data Concentrator For information LGWSS Landing Gear Well Surveillance System Approved . LH Left Hand Approved LIB Loudspeaker and Indicator Box Approved LIBOR London Inter-Bank Offered Rate For information LIFO Last In First Out For information LIM Limit Approved LIM Limitation Approved LIM Limiter Approved LIM Limiting Approved LIMG Limiting For information LIPPLE Lowest Intelligible Phone Power Level For information LIQD Liquid Approved LIR Logistic Information Referential For information LIS Localizer Inertial Smoothing Approved LISA Light Interface Standardization Adapter For information LKD Locked Approved LKG Locking Approved LKR Locker For information LKSHFT Lockshaft Approved LL Latitude/longitude Approved LL Low Level For information LL1 Waypoint from Waypoint List Abbreviated For information LLA Lavatory Light Adapter Approved LLAC Low Level AC Voltage For information LLDC Low Level DC Voltage For information LLDC Low Level Direct Current For information LLF Lateral Load Fitting For information LLI Long Lead Time Item For information LLL Low Level Light For information LLO Long Leadtime Option For information LLP Lead Logistics Provider For information LLS Left Line Select Key For information LLS Liquid Level Sensor For information LLS Low-Level Solid Radioactive Material For information LLSELV Left Lock Selector Valve For information LMC Least Material Condition For information LMC Last Minute Change For information LMES Loss of Main Electrical Supply Approved LMF Local Maintenance Function Approved LMM Compass Locator at Middle Marker For information LMP Left Middle Plug Approved LMP Line Maintenance Part For information LMS Leakage Measurement System Approved LMT Local Mean Time For information LNA Label Not Available For information LNA Low Noise Amplifier Approved LNG Long Approved LNR Linear Approved LO Low Approved LO Local Oscillator For information LO Link Object For information LOC Localizer Approved LOC List of Overhaulable Components For information LOCKG Locking Approved LODD Last acceptable On Dock Date For information LOFT Line Orientated Flight Training For information LOG Logic For information . LOGO Logogram For information Lo Lo Handling Load On Load Out Handling For information LOM Compass Locator at Outer Marker For information LONG Longitude Approved LONG Longitudinal For information LONGL Longitudinal Approved LONGN Longeron Approved LOP Low Oil Pressure Approved LOP Life Operational Process For information LOP Life Of Product For information LOPA Layout of Passenger Accommodation For information LO PR Low Pressure For information LORAN Long Range Aid to Air Navigation For information LOS Lavatory Occupied Sign For information LP Low Pressure Approved LPC Low Pressure Compressor Approved LPC Less Paper in the Cockpit For information LPC Low Compressor Rotor and Stator Assembly For information LPCNG LPC New Generation Approved LPE Laissez-Passer Exceptionnel For information LPFEV Long Power Failure Event For information LPO Landings per Overhaul For information LPT Low Pressure Turbine Approved LPT Front Compressor Drive Turbine Rotor Assembly For information LPTACC Low Pressure Turbine Active Clearance Control Approved LPTC Low Pressure Turbine Clearance Approved LPTCC Low Pressure Turbine Case Cooling Approved LPTCC Low Pressure Turbine Clearance Control Approved LPTR Low Pressure Turbine Rotor Approved LPU Lightning Protection Unit Approved LR Long Range For information LRE List of Radioactive and Hazardous Elements Approved LRI Line Replaceable Item Approved LRI Liquid Resin Infusion For information LRM Line Replaceable Module Approved LROPS Long Range Operations Approved LRRA Low Range Radio Altimeter For information LRU Line Replaceable Unit Approved LS Landing System Approved LS Loudspeaker Approved LS Low Speed Approved LS Line Select Key For information LS Late Start Date For information LS Loadable Software For information LS Line Station For information LSA Low Specific Activity Radioactive Material For information LSA Low Speed Aileron For information LSAP Loadable Software Aircraft Parts For information LSB Least Significant Bit Approved LSB Lower Sideband Approved LSBM Load Secure Batch Media Approved LSC Load Signature Certificate Approved LSC Least Significant Character For information LSD Logistic Support Date For information LSDS Load Sensing Drive Strut Approved LSI Large Scale Integrated/Integration/Integrator Approved . X For information M Magenta For information M Mode For information M/L Mood Lighting Approved M&T Methods & Tools For information MA Maintenance Annunciator For information MAA Maximum Authorized IFR Altitude For information MAAI Military Aircraft Accident Incident Investigation For information MAAP Members and Associated Partners For information MABH Minimum Approach Breakoff Height For information MAC Mean Aerodynamic Chord Approved MAC Maintenance Action Classification For information MACH Machine / Machining / To Machine For information MACT Module Application Configuration Table Approved MADAR Malfunction Detection Analysis and Recording For information Subsystem MAF Maintenance Access Function Approved MAG Magnetic Approved MAG Magazine For information .LSP Low Speed For information LSP Loadable Software Part For information LSR Load Shedding Relay Approved LSR Last Significant Bit For information LSSELV Left Steering Selector Valve For information LSU Lavatory Service Unit For information LSV Left Servo metering Valve For information LT Light Approved LT Teleloading For information LTD Limited Approved LTD PLT Lighted Plate Approved LTG Lighting Approved LTM Livestock Transportation Manual Approved LTO Landing and TakeOff For information LTP Left Top Plug Approved LTP Lead Transport Provider For information LTR Lab Test Request For information LTR Laboratory Test Requirements For information LTS Lights For information LTS Load and Trim Sheet Software For information LTV Loan To Value For information LUAR Laboratory Unit Acceptance Review For information LV Low Voltage Approved LVDS Low Voltage Differential Signaling Approved LVDT Linear Variable Differential Transducer Approved LVL Level Approved LVL/CH Level Change For information LVO Low Visibility Operations Approved LVP Low Visibility Procedure Approved LVR Lever Approved LVR Louver For information LVT Linear Voltage Transducer Approved LW Landing Weight Approved LW Left Wing For information LWP Large Work Package For information LWR Lower Approved LWSA Lavatory Water Supply Assy Approved L-x Lavatory . Mag.M Magnetized Material For information MAG DEC Magnetic Declination Approved MAGN Magnetron For information MAG VAR Magnetic Variation For information MAIDS Multipurpose Automatic Inspection and Diagnostic For information System MAIN MUX Main Multiplexer Approved MAINT Maintenance Approved MAJ Major For information MALS Medium Intensity Approach Light System For information MALSR Medium Intensity Approach Light System with Runway For information Align MAN Manual Approved MAP Ground Mapping For information MAP Master Annunciator Panel For information MAP Mise au point For information MAP Missed Approach Segment For information MAPSP Master Attendant Passenger Service Panel For information MAREP Maintenance Report For information MAS Modification Approval Sheet For information MASI Mach Airspeed Indicator For information MAT Multi-purpose Access Terminal Approved MAT Maintenance Access Terminal For information MAT MOD Assessment Tool For information MAWP Missed Approach Waypoint For information MAX Maximum Approved MBSE Model-Based Systems Engineering For information MC Master Change For information MC Material Cost For information MC Means of Compliance For information MC Motor Controller For information MCA Minimum Crossing Altitude For information MCA Master Component Assembly For information MCA Maintenance Central Access Approved MCBF Mean Cycles between Failures For information MCC Modification Customer Chart For information MCC Multi Crew Cooperation For information MCC Maintenance Control Center For information MCCP Major Change Certification Plan For information MCCS Major Change Certification Summary For information MCCT Module Common Configuration Table For information MCD Movable Class Divider Approved MCDL Master Configuration Deviation List Approved MCDU Multipurpose Control & Display Unit Approved MCE Motor Control Electronic Approved MCH Machined For information MCL Maximum Climb Approved MCPU Motor Control and Protection Unit Approved MCR Manufacturer Change Request For information MCR Maximum Cruise For information MCRI Military Certification Review Item For information MCS Mission Computer Subsystem Approved MCS MultiChannel Aviation Satellite Communication System For information MCT Maximum Continuous Thrust Approved MCU Master Control Unit Approved . Business Management For information System MEC Main Engine Control Approved MECH Mechanic Approved MECH Mechanical Approved MECH Mechanism Approved MED Medium Approved MEDB Model/Engine DataBase For information MEL Minimum Equipment List Approved MEM Memory For information MEO Middle Earth Orbit Approved MEP Main Executive Program Approved MER Manufacturing Engineering Responsible For information MES Main Engine Start Approved MES Maintenance Economics Sheet For information MET Meteorological Approved MEV Main Electro Valve For information MEV Million Electron-Volts For information MEW Manufacturer's Empty Weight Approved MF Medium Frequencies For information MFA Memorized Fault Annunciator Approved MFD MultiFunction Display Approved MFG Manufacturing Approved MFP Maintenance Facility Planning Approved MFP MultiFunction Probe Approved MFP Mixed Fission Products For information MFR Manufacturer Approved MFS MultiFunction Sensor Approved MFT Multi Function Team For information MFTW Maximum Design Fuel Transfer Weight For information MFW Maximum Design Flight Weight For information MG Maturity Gate For information MG Milestone Gate For information .MCU Modular Concept Unit Approved MCUR Mean Cycle Between Unscheduled Removals Approved MCVL Manual Configuration Variation List For information MCW Modulated Continuous Wave For information MD Main Deck Approved MDA Minimum Descent Altitude Approved MDA Minimum Decision Altitude For information MDAU Modular Data Acquisition Unit For information MDCC Main Deck Cargo Compartment Approved MDCD Main Deck Cargo Door Approved MDDU Multipurpose Disk Drive Unit Approved MDF Medium Frequency Direction Finding Station For information MDH Minimum Descent Height For information MDL Module Approved MDM Material Data Meeting For information MDR Multiregional DBS (Digital Broadcast System) Receiver Approved MDU Manual Drive Unit Approved MDU Multiplier Divider Unit For information MDU Mobile Delivery Unit For information MEA Minimum En Route IFR Altitude For information MEAS Measurement Approved MEASRG Measuring For information ME-BMS Manufacturing Engineering. MGB Main Gear Box Approved MGMT Management Approved MGR Maturity Gate Review For information MGT Management For information MGY Master Geometry For information MHEA Maintenance Human Error Analysis For information MHM Maintenance HMI Manager Approved MHSU Magnetic Heading Sensor Unit For information MHZ Megahertz For information MI Magnetic Indicator Approved MIB Management Information Base Approved MIC Microphone Approved MICADA Maintenance Improved Cabin Data Authoring For information MICBAC Micro-System Bus Access Channel Approved MID Middle Approved MID Modification Information Document Approved MIDU Multi-Input Interactive Display Unit Approved MILA MIni Light Adapter For information MIMOS Maintenance Information Management tOols for Systems For information MIN Minimum Approved MIN Minor For information MIN FUEL Minimum Fuel For information MIN TIME Minimum Time For information MIP Maintenance Information Printer For information MIP Master Interphone Panel Approved MIPO Manually Issued Purchase Order For information MIPS Maintenance Information and Planning System For information MIS Maintenance Information System For information MISC Miscellaneous Approved MISP Major In Service Problem For information MISS db Major In Service Solution-database For information MJW Maximum Jacking Weight For information MKC Manufacturing Key Characteristic For information MKGS Markings For information MKR Marker (radio) Beacon Approved MLA Maneuver Load Alleviation Approved MLAP Maintenance Laptop Approved MLB Maintenance LogBook Approved MLC Mood Lighting Controller Approved MLD Molded For information MLFAP Mood Lighting Flight Attendant Panel Approved MLG Main Landing Gear Approved MLGB Main Landing Gear Bay Approved MLI Magnetic Level Indicator Approved MLIH Magnetic Level Indicator Housing Approved MLS Microwave Landing System Approved MLW Maximum Landing Weight Approved MM Middle Marker Approved MM Maintenance Manual For information MM Main Multiplexer For information MM Manufacturing Manager For information MMC Maximum Material Condition For information MMDB Mechanical Main Data Bank For information MME Maintenance & Maintainability Evaluation For information MMEL Master Minimum Equipment List Approved . MMES Man-Machine Environment System For information MMH/FH Maintenance Man Hours per Flight Hour For information MMI Manual Magnetic Indicator Approved MMR Multi-Mode Receiver Approved MNFOLD Manifold Approved MNI Manufacturing Notice Instruction For information MNPS Minimum Navigation Performance Specification For information MoA Memorandum of Agreement For information MOA Maintenance Organisation Approval For information MoB Make or Buy For information MOCA Minimum Obstruction Clearance Altitude For information MOD Modification Approved MOD Modulator For information MOD/V Modulating Valve For information Modem Modulator-Demodulator Approved MODLTR Modulator Approved MOI Modification Operational Impact For information MOKA Methodology and software tools Oriented to KBE For information Applications MoM Minutes of Meeting For information MOM Maintenance Organization Manual For information MON Monitor Approved MON Monitored Approved MON Monitoring Approved MONG Monitoring For information MONMT Monument Approved MORA Minimum Off Route Altitude Approved MORE Mobile Online Reclamation For information MORV Mixer Overpressure Relief Valve Approved MOS Metal Oxyde Semiconductor Approved MOS Maintenance Operation Software For information MOT Motor Approved MOT Motorized Approved MOU Memorandum of Understanding For information MP Modification Proposal Approved MP Main Processor For information MP Maintenance Practices For information MP Maintenance Procedure For information MP Maintenance Panel For information MPA Maximum Power Assurance For information MPB Micro Processor Bipolar For information MPC Maintenance Panel Committee For information MPD Maintenance Planning Document Approved MPDS Maintenance Planning Data Support For information MPDS Mobile Packet Data Service Approved MPFAP Multi Purpose Flight Attendant Panel Approved MPL Maximum Permitted Life For information MPM Maintenance Program Manager For information MPP Maintenance Program Proposal For information MPR Multipurpose Register For information MPS Maximum Performance Specifications For information MPS Multiplex Power Supply For information MPS Master Production Schedule For information MPS Maintenance Panel Screening For information MPT Manufacturing Process Team For information MPU Modem Processor Unit Approved . Supportability For information MRS Malfunction Reporting Systems For information MRTT Multi Role Tanker Transport For information MRW Maximum Ramp Weight Approved MS Maintenance Schedule For information MS Military Standard For information MS Master Schedule For information MSA Minimum Safe Altitude Approved MSA Master Services Agreement For information MSB Most Significant Bit Approved MSB Modification Service Bulletin For information MSC Airbus Materiel Support Centre For information MSC Maintenance Steering Committee For information MSCN Manufacturer Specification Change Notice For information MSD Mass Storage Device For information MSDS Material Safety Data Sheet Approved MSE Maintenance System Extract For information MSF Multi-System Function For information MSG Maintenance Steering Group Approved MSG Message Approved MSI Maintenance Significant Item Approved MSI Medium Scale Integrated For information MSL Mean Sea Level Approved MSL Maintenance Significant Item List For information MSL Maintenance System Load Approved MSM Monitoring System Module Approved MSN Manufacturer Serial Number Approved MSOV Main Deck Shut Off Valve For information MSP Microsoft Project For information MSTR Master Approved MSU Media Server Unit Approved MSU Mode Selector Unit (IRS) Approved MSU Motor Switching Unit Approved MSU Magnetic Sensor Unit For information MSW Microswitch Approved MT Mount For information MT Mapping Table For information MTA Maintenance Task Analysis For information MTAD Military Transport Aircraft Division For information . Reliability.MPU Magnetic Pickup For information MPV Manifold Pressure Valve Approved MPV Multi Purpose Vehicle For information MQM Mobile Quality Management For information MQPB Minimum Quantity Price Break For information MRA Minimum Reception Altitude For information MRB Maintenance Review Board Approved MRB Materials Review Board For information MRBD Maintenance Review Board Document For information MRBR Maintenance Review Board Report Approved MRC Mobile Rack Concept For information MRIU Maintenance & Recording Interface Unit For information MRL Manufacturing Readiness Level For information MRL Material Readiness Level For information MRO Maintenance and Repair Organization For information MRP Material Requirements Planning For information MRP Material Resource Planning For information MRS Maintenance. MTBD Mean Time Between Defects Approved MTBF Mean Time Between Failures Approved MTBI Mean Time Between Inspection For information MTBIFS Mean Time Between In Flight Shut-down For information MTBPR Mean Time Between Premature Removals For information MTBR Mean Time Between Removals Approved MTBT Mean Time Between Trouble For information MTBUR Mean Time Between Unscheduled Removals Approved MTE Manual Test Equipment For information MTG Mounting Approved MTGC Mounting Center For information MTI Multi Tank Indicator Approved MTN Motion For information MTO Maximum Take-Off Approved MTO Météo For information MTOGW Maximum Takeoff Gross Weight Approved MTOM Maintenance Training Organization Manual For information MTOP Maintenance Task Operating Plan For information MTOW Maximum Takeoff Weight Approved MTP Maintenance and Test Panel Approved MTR Meter For information MTRM Mid Term Planning Meeting For information MTS Maintenance Training Simulator For information MTS Mixer Temperature Sensor For information MTTF Mean Time to Failure Approved MTTR Mean Time to Repair Approved MTTUR Mean Time to Unscheduled Removal Approved MTUR Mean Time Between Unscheduled Removals For information MTW Maximum Taxi Weight Approved MTXW Maximum Taxi Weight For information MU Management Unit Approved MUX Multiplex Approved MUX Multiplexer Approved MV Multivibrator For information MVDR Multiple VHF Data Radio Approved MVT Movement Approved MW Minimum Weight For information MWARN Master Warning For information MWC Master Warning Computer For information MWE Manufacturer's Weight Empty For information MWG Maintenance Working Group For information MWP Master Warning Panel For information MWS Master Warning System For information MXR Mixer Approved MYR Mid-Year Review For information MZFCG Maximum Zero Fuel Center of Gravity For information mZFW Minimum Zero Fuel Weight For information MZFW Maximum Zero Fuel Weight Approved N North Approved N Neon For information N Normal For information N/A Not Applicable Approved N/P Next Page For information N/W Nose Wheel Approved N/WS Nose Wheel Steering Approved N.R Normal Operating Range For information .O. N1 Engine Fan Speed Approved N1 Low Pressure Rotor Speed Approved N1.D N1 Descent Approved N1.L N1 Latch Approved N2 High Pressure Rotor Speed Approved NA Neutral Axis For information NAA National Aviation Authority For information NAC Nacelle Approved NAC Nacelle Air Cooling Approved NACA National Advisory Committee for Aeronautics For information NAC STA Nacelle Station For information NADP Noise Abatement Departure Procedure Approved NAI Nacelle Anti-Icing Approved NAIF NSS ACR Instrumentation Function For information NAS Navy and Army Standard Approved NASA National Aeronautics and Space Administration Approved NatCo National Company For information NATS North American Telephone System Approved NAV Navigation Approved NAVAID Navigation Aid Approved NAWSC No Additional Work to Show Compliance For information NBCM Normal Brake Control Manifold Approved NBF Network BITE Function Approved NBM Nicht einzuarbeitende BM For information NBPT No Break Power Transfer Approved NBS National Bureau of Standards For information NBSELV Normal Brake Selector Valve Approved NC Normally Closed Approved NC Non Conformity For information NC Numerical Control For information NCAGE NATO Commercial and Government Entity For information NCC Nacelle Compartment Cooling For information NCD No Computed Data Approved NCF Non Crimp Fabric For information NCF Nose and Center Fuselage For information NCH Noise Compensated Headset For information NCLL Not Closed & Latched & Locked For information NCR NSS Communication Router Approved NCU NSS Control Unit Approved NCU Navigation Computer Unit For information NCU Network Control Unit Approved NCV Nacelle Cooling Valve Approved ND Navigation Display Approved ND Navigation Database For information NDA Non Disclosure Agreement For information NDB Non-Directional Beacon Approved NDB Navigation Data Base For information NDB Non-Directional Radio Beacon For information NDM Noise Definition Manual Approved NDT Non-Destructive Test Approved NEG Negative Approved NELI Non-Electrical Galley Inserts For information NFA No Further Action For information NFC Not Fully Closed For information NFO Not Fully Open For information NFOV Narrow Field of View Approved . NGCW Next Generation Composite Wing For information NHA Next Higher Assembly Approved NICE Network Integrated Certification Environment For information NLA Non-Listed Assembly For information NLCP Noise Level Calculation Program For information NLG Nose Landing Gear Approved NMI Non Maskable Interrupt Approved N MOS Negative Metal Oxide Semiconductor Approved N MOS N-Channel Metal Oxide Semiconductor For information NMS Noise Masking System Approved NMU Noise Masking Unit Approved No Number Approved NO Normal Operation Approved NO Normally Open Approved NO Normal Operation in SSM For information NonflaG Non-Flammable Compressor Gas For information NOPT No Procedure Turn Required For information NORM Normal Approved NOTAM Notice to Airmen For information NOVOLRAM Non-volatile Random Access Memory Approved NOx Nitrogen Oxides For information NOy Nitrous Oxides For information NP Non Procurable For information NPA Non Precision Approach For information NPI New Product Introduction For information NPN Negative-Positive-Negative For information NPT National Taper Pipe (Thread) For information NPV Net Present Value For information NRC Non-Recurring Cost For information NRC Non-Recurring Costs For information NRE Non-Recurring Expenditure For information NRP Navigation Reference Point For information NRV Non Return Valve For information NRW Net Recoverable Weight Approved NRZ Non Return To Zero For information NS No Smoking Approved NSA Norme Sud Aviation Approved NSCM NATO Supply Code for Manufacturers Approved NSDW Non Specific Design Work Approved NSIU Nose Static Interface Unit Approved NSM Network Server Module Approved NSP New Systems Policy For information NSS Network Server System Approved NSU Network Server Unit For information NSV Normal Servo Valve For information NTC Notice To Crew For information NTF Non-Textile Floor covering Approved NTM Nondestructive Testing Manual Approved NTO No Technical Objection For information NTS Not To Scale For information NTSC National Television System Committee Approved NTWK Network Approved NUA Normal Unlock Actuator For information NUM Numerical Approved NVM Non-Volatile Memory Approved NW Nose Wheel For information . NWS Nose Wheel Steering For information Nz Vertical Load Factor For information O Open Approved O Orange For information O/C Open Circuit For information O/P Output Approved O2 Oxygen (Symbol) Approved OAD Overall Aircraft Design For information OADMT Overall Aircraft Design Management Team For information OAMS Onboard Asynchronous Messaging Service Approved OANC Onboard Airport Navigation Computer Approved OANS Onboard Airport Navigation System Approved OASI Operation and Service Instruction Manual For information OASIS Overall Aircraft Systems Integration Strategy For information OAT Outside Air Temperature Approved OAV On Aircraft Validation For information OBCE On-Board Control Equipment Approved OBCE-WW On-Board Control Equipment WorldWide Approved OBOGS On Board Oxygen Generation System Approved OBRM On Board Replaceable Module Approved OBS Omni Bearing Selector Approved OBS Organization Breakdown Structure For information OBSV Observation For information OBSVR Observer For information OC Oceanic Clearance Approved OC Open Circuit Approved OC Overcurrent Approved OC On Condition For information OC Order Card For information OC Other Change For information OCC Occurrence For information OCCPD Occupied Approved OCCPNT Occupant Approved OCED Operator-Customized ECAM Database Approved OCL Obstacle Clearance Limit For information OCM Outflow Valve Control Module Approved OCM Out of Control Months For information OCS Obstacle Clearance Surface For information OCS Overall Customer Satisfaction For information OCSM Outflow Valve Control and Sensor Module Approved OCU Outflow Valve Control Unit Approved OD Outside Diameter Approved ODD On Dock Date For information ODSM Open world Data Storage Module Approved ODU Optical Display Unit Approved OEA Oxygen Enriched Air Approved OEB Operations Engineering Bulletin For information OEI One Engine Inoperative For information OEM Original Equipment Manufacturer For information OEW Operational Empty Weight Approved OF Overfrequency Approved OFDM Onboard Flight Data Monitoring Approved OFF/R Off Reset Approved OFFR Off/Reset For information OFMV Oil Flow Management Valve Approved OFP Operational Flight Path For information . OFST Offset Approved OFV Outflow Valve Approved OFW Outer False Work Approved OG Operational Group For information OGV Outlet Guide Vane Approved OH Opposite Hand Approved OH Operation Hours For information OHC Open Hole Compressive Strength For information OHDS OverHeat Detection System Approved OHDU Overheat Detection Unit Approved OHP Overhead Panel For information OHSC Overhead Stowage Compartment Approved OHT Open Hole Tensile Strength For information OHU Optical Head Unit Approved OI Operational Interruption For information OIS Onboard Information System Approved OIT Oil Inlet Temperature Approved OIT Onboard Information Terminal Approved OIT Operator Information Transmission Approved OJT On Job Training For information OK Correct Approved OLA Operational Level Agreement For information OLB OPS Library Browser For information OLBL OPS Library Browser Load For information OLE Open Logbook Entries For information OLIVER Output Level Intended for Very Excellent Reproduction For information OLMS Operational Loads Monitoring System For information OLS Onboard Loadable Software For information OLW Operational Landing Weight For information OM Outer Marker Approved OM Overhaul Manual For information OML Outer Mould Line For information OMM Overhaul Manual Manufacturer For information OMP Operator Maintenance Program For information OMS Onboard Maintenance System Approved OMT Onboard Maintenance Terminal Approved OMTBF Observed Mean Time between Failure For information OMTS On-Board Mobile Telephony System Approved OMV Overhaul Manual Vendor For information ONS Omega Navigation System For information OOT Oil Outlet Temperature Approved OP Opalescent For information OP Operational Approved OPA Operability Performance Assessment For information OPAL Order Processing Automated Line For information OPC Operational Program Configuration For information OPD Overall Physical Design For information OPER Operative/Operation/Operating Approved OPM Operational Manual For information OPMS Oleo Pressure Monitoring System Approved OPNG Opening Approved OPP Opposite Approved OPS Operations Approved OPS Operational Program Software For information OPT Optimum Approved OPT Optional Approved . OPTL Optional For information OPTS Oleo Pressure and Temperature Sensor Approved OPU Overspeed Protection Unit Approved OPU Overvoltage Protection Unit Approved OPV Overpressure Valve Approved OR Operational Reliability For information ORF Orifice For information Org Organisation For information Org Per Organic Peroxide For information ORM Onboard Replaceable Module For information ORT Owner Requirement Table Approved ORT Occurrence Reporting Table For information ORVD Overpressure Relief Valve with Dump Function For information ORZ Omni Range Zero For information OS Operating System Approved OS Operational Scenario For information OSC Oscillator For information OSCM Oxygen System Control and Monitoring Approved OSCU Oxygen System Control Unit Approved OSD Overall System Design For information OSD Operational Suitability Data For information OSF Open world Server Function Approved OSFC Open world Server Function Cabinet Approved OSG Overspeed Safety Governor For information OSM Operational Supplier Manager For information OSS Option Selectable Software For information OSW Out of Sequence Work For information OTC Operability Test Card For information OTD On Time Delivery For information OTH On Time Handover For information OTOW Operational Take-Off Weight For information OTP One Time Password For information OTSSU Outboard Transmission Speed Sensor Unit Approved OU Outlet Unit Approved OUT Outlet Approved OUT Output For information OUTB Outbound Approved OUTBD Outboard Approved OUTFLW Outflow Approved OUTR Outer Approved OV Over For information OVBD Overboard Approved OVF Over Frequency For information OVFL Overflow Approved OVHD Overhead Approved OVHT Overheat Approved OVID Obviously Visible Impact Damage For information OVLD Overload Approved OVPRESS Overpressure Approved OVRD Override Approved OVSP Overspeed Approved OVSTEER Oversteer Approved OVTEMP Overtemperature Approved OVV Overvoltage For information OW Outer Wing For information OWAG Open World A/C Ground Communication For information . MACH Profile Mach For information P.P.ALT Profile Altitude For information P. Prevention Process For information P. off) For information P&D Performance & Development For information P&PM Project & Program Management For information PA Passenger Address Approved PA Public Address For information PAA Primary Airworthiness Authority For information PA AMP Passenger Address Amplifier For information PAC Production Activity Control For information PAD Partner Agreement Document For information PAD Post Aircraft Delivery For information PAD Proposed Airworthiness Directive For information PADS Pneumatic Air Distribution System Approved PAF Project Administration File For information PAL Programmable Array Logic For information PAM Product Assurance Manager For information PAN Process Assurance Nominee For information PAR Precision Approach Radar For information PARAM Parameter Approved PARK Parking Approved PART Partner Assessment for Research & Technology For information PAS Pitch Attitude Sensor Approved PATCC Production Aircraft Test Completion Certificate For information PATM Production Aircraft Test Manual For information PATS Passenger Air-to-Ground Telephone System Approved PAX Passenger Approved PAX PAX Announcement Entertainment and Service Multiplex For information Sys PB Policy Board For information PBD Place Bearing/Distance Approved PBE Protective Breathing Equipment Approved .DES Profile Descent For information P.OWB Outer WIing Box For information OWD Open World Diode Approved OWE Operating Weight Empty For information OWP Over Wing Panel For information OXY Oxygen Approved Oxy M Oxidizing Material For information P Purple Approved P Pressure For information P Roll Rate For information P Probability For information P/B Pushbutton Approved P/BSW Pushbutton Switch Approved P/C Printed Circuit Approved P/C Premium Class Approved P/L Payload For information P/N Part Number Approved P/P ROM Preprocessor ROM For information P/Y Premium Economy Class Approved P.CLB Profile Climb For information P.SPD Profile Speed For information P(-+ OFF) Polarity (minus.N1 Profile N1 For information P.EPR Profile EPR For information P. plus. Do.PBE Product Based Evaluation For information PBIT Power-Up Built-in Test Approved PBM Power Plant Build-up Manual Approved P-BoM Production-Bill of Material For information PBR Portal Business Representative For information PBS Product Breakdown Structure For information PBSELV Park Brake Selector Valve Approved PBSW Pushbutton Switch Approved PBV Pack Bay Ventilation For information PC Pack Controller Approved PC Personal Computer Approved PC Packing Card For information PC Production Committee For information PCA Portland Cement Association For information PCA Positive Control Airspace For information PCB Printed Circuit Board Approved PCCB Process Change Control Board For information PCD Performance Compliance Document For information PCDM Primary Contactor Driver Module Approved PCDS Primary Contactor Driver System Approved PCE Personal Consumption Expenditures For information PCE Precooler Approved PCF Passenger Cum Freighter For information PCM Power Conditioning Module Approved PCM Pulse Code Modulation Approved PCM Project Certification Manager For information PCMCIA Personal Computer Memory Card International For information Association PCOS Power Cowl Opening System Approved PCPU Primary COS Power Unit Approved PCS Propulsion Control System Approved PCT Probe Compensator Temperature Approved PCT Percent For information PCT Product Cross-reference Table For information PCU Passenger Control Unit Approved PCU Power Control Unit Approved PCU Power Controller Unit Approved PD Principle Diagram Approved PD Pitch Diameter For information PDA Personal Digital Assistant For information PDB Performance Database Approved PDC Panel Display Catalog For information PDC Procurement Data Card For information PDC Procedural Documentation Council For information PDCA Plan. Check. Act For information PDCS Power Distribution Control System Approved PDD Process Description Document For information PDDC Provisioning Descriptive Data Card For information PDF Portable Document Format For information PDFU Pedal Damping and Friction Unit Approved PDI Planning Driven Item For information PDL Portable Data Loader Approved PDLCU Privacy Door Lock Control Unit For information PDLS Privacy Door Lock System For information PDM Post Delivery Modification Material For information PDM Privacy Door Module For information . PDM Product Data Management For information PDMC Power Distribution Maintenance Computer Approved PDMI Power Distribution Maintenance Interface Approved PDMIC Power Distribution Maintenance Interface Contactor Approved PDMMF Power Distribution Monitoring and Maintenance Function Approved PDO Power Door Opening Approved PDOS Power Door Opening System Approved PDP Product Development Plan For information PDP Product Development Process For information PDR Product Design Review For information PDR Preliminary Design Review For information PDR Performance & Development Review For information PDRC Procurement Data Reference Card For information PDT Project Development Team For information PDT Probe Dual Temperature Approved PDU Power Drive Unit Approved PDU Pulled Delivery Unit For information PE HP Stage Air Pressure Approved PED Pedestal Approved PED Portable Electronic Device Approved PEDMU Primary Electrical Distribution Management Unit Approved PEF Pylon Extension Fairing Approved PEGS Production Engineering Group System For information PEM Performance Engineers Manual For information PEP Performance Engineers Program For information PEPDC Primary Electrical Power Distribution Center Approved PERC Percussion For information PERF Performance Approved PERM Permanent Approved PERS Personal Approved PES Passenger Entertainment System Approved PES Production Engineering Specification For information PESAR Passenger Entertainment System Audio Reproducer Approved PESC PES Controller Approved PESMMUX Passenger Entertainment System Main Mux Approved PF Pilot Flying Approved PF Power Factor Approved PFCS Primary Flight Control System Approved PFD Primary Flight Display Approved PFDB Power Floor Disconnect Box Approved PFEP Plan For Every Part For information PFEV Power Failure Event For information PFF Pre-First Flight For information PFIN Power Failure Interrupt For information PFIS Passenger Flight Information System Approved PFQ Preselected Fuel Quantity Approved PFR Post Flight Report Approved PFS Pre-Feasibility Study For information PFSLSM P&FS Logistic Support Manager For information PFTU Pedal Feel and Trim Unit Approved PG Page For information PG BUS Program Bus For information PH Phase Approved PHA Preliminary Hazard Analysis For information PHC Probe Heat Computer Approved . PHD Protruding Head Approved PHMU Power Health Monitoring Unit Approved PI Procedure Turn to an Intercept For information PI&CI Program Integration & Continuous Improvement For information PIA Peripheral Interface Adapter For information PIA Programmable Interface Adapter For information PICA Product Integrity Continued Airworthiness For information PIESD Passenger Information and Entertainment Services Approved Domain PIF Project Installation File For information PIH Pressure Interstage Hydraulic (PW eng) For information PIM Programming and Indication Module For information PIM Passive InterModulation Approved PIN Personal Identification Number For information PIN PROG Pin Programming Approved PIPC Power Plant Illustrated Parts Catalog Approved PIR Pressure Interstage Return For information PIREP Pilot Report Approved PISA Passenger Interface and Supply Adapter Approved PISR Portal IS Representative For information PIU Passenger Information Unit Approved PIV Particle Image Velocimetry For information PIX Picture For information PK Pink For information PKC Performance Key Characteristic For information PKI Public Key Infrastructure Approved PKK Power Plant Kit Approved PL Plate Approved PL Plug For information PL Party Logistics For information PLA Power Light Adapter Approved PLATF Platform For information PLC Powerline Communication Approved PLCRD Placard Approved PLM Product Lifecycle Management For information PLS Pulse For information PLSP Point Level Sensor Processor Approved PLT Pilot For information PLU Power Lock Unit For information PLYWD Plywood For information PM Phase Modulation For information PM Project Management For information PMA Permanent Magnet Alternator Approved PMA Parts Manufacturing Approval For information PMAT Portable Multipurpose Access Terminal Approved PMC Power Management Control Approved PMC Power Management Controller Approved PMC Process Material Control For information PMCA Project Management Capability Assessment For information PMDB Production Management Data Base Approved PMG Permanent Magnet Generator Approved PMI Project Management Institute For information PMI Project Management Institute For information PMITS Project Management Information Technology System For information PMM Personalization Memory Module Approved PMM Process Maturity Model For information . PMMM (PM3) Project Management Maturity Measure For information PMO Project Management Office For information PMO Project Management Operation For information PMP Pump Approved PMP Performance Monitoring Program For information PMP Primary Maintenance Process For information PMPA Project Manager Performance Assessment For information PMR Performance Maintenance Recorder Approved PMS Process and Material Specification Approved PMS Performance Management System For information PMT Process Management Team For information PMU Power Management Unit Approved PMUX Power Plant Multiplexer Approved PMUX Propulsion Multiplexer For information PN Part Number Approved PNEP Pre-NAV Engagement Path For information PNEU Pneumatic Approved PNF Pilot Non Flying Approved PNL Panel Approved PNP Positive-Negative-Positive For information PNR Part Number Approved PNT Paint / Painting / To Paint For information PNTL Pintle Approved PO Pickoff For information PO Purchase Order For information PO Process Owner For information POA Production Organization Approval For information POB Pressure-Off Brake Approved POD Process Owner Delegate For information PODD Passenger Owned Devices Domain Approved PoE Point of Embodiment For information P-OFF Power Off For information POM Production Organisation Manual For information POM Point of Measurement Approved POM Process Operational Manager For information P-ON Power On For information POR Point of Regulation Approved PORT Portable Approved POS Position Approved POST Power on Self Test For information POT Potentiometer Approved PoU Point of Use For information POXIP Passenger Oxygen Indication Panel Approved PP Production Panel For information PPB Provisioning Parts Breakdown For information PPBU Power Plant Build Up For information PPC Phosphor Protection Circuit For information PPDC Provisioning Procurement Data Card For information PPDES Product Performance Data Exchange Specifications For information PPE Proofreading Process Evidence For information PPH Policy and Procedures Handbook For information PPI Plan Position Indicator For information PPIPC Power Plant IPC For information PPM Parts per Million For information PPM Performance Programs Manual For information PPM Pulse Position Modulation For information . PPM Project Planning Manager For information PPM Portfolio Management For information PPOS Present Position Approved PPS Practical Problem Solving For information PPU Position Pickoff Unit Approved PQAS Program Quality Assurance System For information PQM Process Quality Manager For information PQR Product Quality Responsible For information PR Pressure Approved PR Power Ready Relay For information PR Progress Meeting For information PR Regulated Pressure (downstream of bleed valve) For information PR Project Review For information PRA Particular Risk Analysis For information PRAM Prerecorded Announcement and Music Approved PRB Probe Approved PRB Patent Review Board For information PRCSG Processing For information PRCSR Processor For information PREAMP Preamplifier Approved PRECOOL Precooler Approved PRED Prediction Approved PRED Predictive Approved PRE-EMPT Pre-emptive Approved PREP Preparation / Prepare / Prepared For information PReq Purchase Request For information PREREC Prerecorded Approved PRESEL Preselection Approved PRESEL Preselector Approved PRES POS Present Position Approved PRESS Pressure Approved PRESS Pressurization Approved PRESS Pressurize Approved PREV Previous Approved PRF Interrogation Rate For information PRGM Program For information PRI Priority Approved PRIM Primary Approved PRIM PRIMary System Approved PRIM PRIMary Computer Approved PRIMES Product Related Information Management Enterprise For information System PRL Parallel For information PRL Parameter Requested List For information PRL/MPL Parameter Recording List/Main Parameter List For information PRM Passenger with Reduced Mobility For information PRM Program Review Meeting For information PRM Process Review Meeting For information PRM Progress Review Meeting For information PROC Procedure Approved PROCSR Processor Approved PROC T Procedure Turn For information PROF Profile Approved PROG Program Approved PROG Programming Approved PROG Progress For information . PROJ Projector Approved PROM Programmable Read Only Memory Approved PROS Present Position For information PROT Protection Approved PROX Proximity Approved PRPHL Peripheral Approved PRR Power Ready Relay Approved PRS Production Repercussion Sheet For information PRSRZ Pressurize For information PRSRZG Pressurizing Approved PRV Pressure Regulating Valve Approved PS Process Solution For information PS Product Structure For information PSA Passenger Service Adapter Approved PSA Physical System Architecture For information PSARI Potential Safety Related Item For information PSB Product Safety Board For information PSC Passenger Supply Channel For information PSC Product Safety Committee For information PSCU Proximity Switch Control Unit Approved PSD Protected Switch Device Approved PSDU Power Supply Decoupling Unit Approved PSI Pounds per Square Inch For information PSIC Proximity Sensor Interface Card Approved PSIU Passenger Service Information Unit Approved PSNR Positioner For information PSP Product Safety Process For information PSP Pressure Sensitive Paint For information PSPM Product Support Procedures Manual For information PSQM Propulsion System Quality Management For information PSR Product Safety Representative For information PSS Passenger Services System Approved PSSA Preliminary System** Safety Assessment For information PSTN Public Switch Telephone Network For information PSU Passenger Service Unit Approved PSU Power Supply Unit Approved PSU Passenger Supply Unit For information PSUD Passenger Service Unit Decoder For information PSV Planned Shop Visit For information PT Point Approved PT Switching Pressure of HP Valve For information PTC Positive Temperature Coefficient Approved PT CODE Part Code For information PTDC Provisioning Technical Data Card For information PTFE Polytetrafluorethylene For information PTLU Pedal Travel Limiting Unit For information PTM Performance Training Manual For information PTP Programming and Test Panel For information PTR Push to Reset Approved PTR Printer For information PTS Purchaser Technical Specification For information PTS Priority To Study For information PTT Push-to-Test Approved PTT Push-to-Talk Approved PTU Power Transfer Unit Approved PTU Power Transformer Unit For information . PU Parts Usage Approved PU Pick Up Approved PU Processing Unit Approved PU Panel Unit For information PURS Purser Approved PVC Polyvinyl Chloride For information PVD Para Visual Director For information PVI Paravisual Indicating Approved PVIS Passenger Visual Information System Approved PVS Process Verification System For information PW Pratt & Whitney Approved PWCU Potable Water Control Unit Approved PWDB Power Wall Disconnect Box For information PWIP Potable Water Indication Panel Approved PWM Pulse Width Modulator Approved PWR Power Approved PWS Potable Water System Approved PWS Predictive WindShear Approved PWSP Potable Water Service Panel Approved PYL Pylon Approved Q Pitch Rate Approved QA Quality Assurance For information QAD Quick-Attach-Detach Approved QAM Quadrature Amplitude Modulation Approved QAR Quick Access Recorder Approved QAT Quadruple ARINC Transmitter Approved QC Quality Control For information QC Quick Change For information QC Quality Checklist For information QCI Quality Continuous Improvement For information QD Quick Donning Approved QDB Quality Directors Board For information QEC Quick Engine Change Approved QEI Quality Event Information For information QF Quality Task Force For information QFRP Quartz Fiber Reinforced Plastic Approved QG Quality gates For information QIG Quality Improvement Group For information QIR Quality Improvement Request For information QISP Quality In-Service Problem For information Qj Probability of Being in Condition j (for structure) For information QLB Quality Log Book For information QMA Qualitative Maintenance Analysis For information QMS Quality Management System For information QMS Quality Management System For information QMU QAM Modulator Unit Approved QPL Qualified Products List For information QRH Quick Reference Handbook For information QSR Quality Survey Report For information QSR Quarterly Service Reports For information QTP Qualification Test Program For information QTR Qualification Test Report For information QTY Quantity Approved QTZ Quartz For information R Red Approved R Right Approved R Release For information R Reset For information R Resistor For information R Yaw Rate For information R/A/G Red/Amber/Green For information R/AD Retro/Adaptation Drawing For information R/C Rate of Climb Approved R/D Rate of Descent Approved R/H Radar Height For information R/I Radio/Inertial Approved R/I Removal/Installation Approved R/L Reading Light Approved R/R Rules/Recommendations For information R/T Radio Transmit Approved R/T Receiver Transmitter Unit For information R.A. Recommended Actions For information R&D Research and Development For information R&R Roles & Responsibilities For information R&T Research and Technology For information RA Radio Altimeter Approved RA Radio Altitude Approved RA Redundancy Assurance For information RA Resolution Advisory For information RAAS Runway Awareness and Advisory System Approved RAC Rotor Active Clearance Approved RAC Rules of the Air and Air Traffic Control For information RAC Readiness Assessment Criteria For information RACC Rotor Active Clearance Control Approved RACON Radar Beacon For information RACSB Rotor Active Clearance Start Bleed Approved RAD Radio Approved RAD Random Access Device For information RAD Roll Anticipation Distance For information RADCON Radar Data Converter For information RADIUS Remote Authentication Dial-In User Service Approved RadM Radioactive Material For information RADVR Random Access Digital Video Reproducer Approved RAG Repair Assessment Guidelines For information RAI Ram Air Inlet Approved RAID Redundant Array of Independent Disks For information RAIL Runway Alignment Indicator Light System For information RAIMS Radio and Audio Integrating Management System Approved RALTU Reprogrammable Annunciator Light Test Unit For information RAM Random Access Memory Approved RAM Responsibility Assignment Matrix For information RAMP Recording Anomalies Maintenance Process For information RAO Ram Air Outlet Approved RAPCON Radar Approach Control For information RAS Repair Design Approval Sheet For information RAS Remote Access Service For information RAS Rien à Signaler For information RASC Reservoir Air Supply Cooler For information RASCI Responsible, Accountable, Support, Consulted, Informed For information RAT Ram Air Turbine Approved RAT Ram Air Temperature For information RATC Remote Air Traffic Control Approved RAX Random Access Transfer Memory For information RB Resource BITE Approved RBAY Rib Bay / Rib Bays For information RBC Resource BITE Configuration For information RBCU Remote Braking Control Unit Approved RBE Requirements Based Engineering For information RBN Radio Beacon For information RBP Right Bottom Plug Approved RBPU Rudder and Brake Pedal Unit Approved RBS Resource Breakdown Structure For information RC Repetitive Chime Approved RC Recurring Cost For information RC Reference Chord For information RC Recurring Costs For information RCC Remote Charge Converter Approved RCC Remote Control Center Approved RCCB Remote Control Circuit Breaker Approved RCCBM RCCB Module Approved RCCP Rough Cut Capacity Planning For information RCCU Remote Calibration Control Unit For information RCD RAAS Configuration DataBase Approved RCDG Recording For information RCDR Recorder Approved RCF Right Center Fuselage For information RCL Recall Approved RCLM Runway Center Line Marking For information RCLS Runway Center Line Light System For information RCP Reverse Current Protection Approved RCPT Receptacle Approved RCPTN Reception Approved RCS Radio Communication System Approved RCSM Resident Customer Support Manager For information RCT Rear Center Tank Approved RCVR Receiver Approved RCVY Recovery Approved RD Retro Drawing Approved RD Right Display For information RD Reqirements Development For information RD Requirement Dossier For information RDC Remote Data Concentrator Approved RDDMI Radio Dual Distance Magnetic Indicator For information RDL Resident Data Loader Approved RDNG Reading For information RDR Request for Design Rework For information RDU Receiver Decoder Unit Approved RDY Ready Approved RE Requirements Engineering For information RE Responsible Engineering For information READG Reading Approved RECIRC Recirculate Approved RECIRC Recirculation Approved RECOG Recognition For information RECONF Reconfiguration Approved RECT Rectifier Approved RED Reduction Approved REDCR Reducer Approved REDUND Redundancy Approved REF Reference Approved REF ALIGN Reference Alignment For information REFF Retraction. Extension and/or Free Fall test For information REFF Root End Fixed Fairing For information REFLNG Refueling For information REFR Refrigerator For information REFUEL Refueling Approved REG Regulator Approved REG Register For information REGUL Regulation Approved REIC Reconfigurable ETOPS Isolation Contactor Approved REIL Runway End Identification Lights For information REL Release Approved REL Reluctance Approved REP Repository Approved REP Reporting Point For information REPL BY Replaced by For information RES Resistance Approved RET Retract Approved RET Return For information RETR Retract For information RETRD Retracted Approved RETRG Retracting For information RETRN Retraction For information REV Reverse Approved REV Revise Approved REV Revision Approved REW Recoverable Empty Weight Approved REX Return of Experience For information RF Radio Frequency Approved RF Reserve Factor For information RFA Request for Amendment For information RFC Request for Change Approved RFC Request For Comments For information RFE Rear Fuselage and Empennage For information RFG Request For GSE For information RFI Radio Frequency Interference Approved RFI Request for Information Approved RFI Resin Film Infusion For information RFID Radio Frequency Identification For information RFN Rear Fuselage Nacelle For information RFP Request for Proposal For information RFQ Request For Quotation For information RFR Request for Revision For information RFS Reason for Selection For information RFS Regardless of Feature Size For information RFS Request for Service For information RFTI Request For Technical Information For information RFU Radio Frequency Unit Approved RFW Request for Work Approved RFX Generic term for an RFI. RFTI or RFP For information RGAU Rate Gyro and Accelerometer Unit Approved RGLRD Regulated For information RGLTG Regulating For information . Improve and Share Experience For information RJB Radio Junction Box For information RK Rack For information RLA Reverser Lever Angle Approved RLD Required Landing Distance Approved RLF Relief Approved RLG Ring Laser Gyro For information R-LMF Right Side Local Maintenance Function Approved RLS Remote Light Sensor For information RLS Right Line Select Key For information RLSED Released For information RLSELV Right Lock Selector Valve For information RLTD Related For information RLY Relay Approved RM Radio Magnetic For information RM Requirements Management For information RM Responsible Manufacturing For information RMCU Remote Magnetic Compensation Unit For information RMI Radio Magnetic Indicator Approved RMM Removable Memory Module For information RMO Retrofit Modification Offer Approved RMO Request for Modification Order For information RMO Retrofit Modification Order For information RMP Radio and Audio Management Panel Approved RMP Radio Management Panel Approved RMP Right Middle Plug For information RMS Root Mean Square For information RMS Reference Manufacturing Shop For information RMSG Reference Manufacturing Shop Group For information RMT Remote Approved RMU Radio Management Unit For information RNAV Area Navigation For information RNG Range Approved RNI Radio Navigation Indicator For information RNP Required Navigation Performance Approved RO Reportable Occurrence For information ROA Return on assets For information ROA Read Only Area For information RODS Read Only Data Service For information ROE Return on equity For information ROI Return on investment (capital employed) For information ROLR Roller Approved ROLS Remote Oil Level Sensor Approved ROM Read Only Memory Approved R-OMS Right Side Onboard Maintenance System Approved ROP Runway end Overrun Protection Approved Ro-Ro Handling Roll On Roll Out Handling For information ROT Runway Occupancy Time Approved ROTG Rotating Approved ROW Runway end Overrun Warning Approved .RGLTN Regulation For information RGTR Register For information RH Right Hand Approved RHEO Rheostat Approved RHL Rudder Hinge Line Approved RHS Relative Humidity Sensor For information RISE Re-use. RP Representative Platform For information RPB Rear Pressure Bulkhead For information RPCU Residual Pressure Control Unit Approved RPDR Reproducer Approved RPF Reporting Processing Function Approved RPG Report Program General For information RPLNT Repellent Approved RPSA Rotating Pressure Sensing Assembly Approved RPTG Repeating Approved RPTG Reporting For information RPTR Repeater Approved RPU Receiver Processor Unit For information RQ Recommended Quantity For information RQ Responsible Quality For information RQRD Required Approved RQS ReQuest Sheet For information RR Rolls Royce Approved RR Low or Medium Range Frequency Radio Range Station For information RR Rudder Rib For information RS Rear Spar Approved RS Repeating Stroke For information RSA Request for Service Allowance For information RSB Rotary Shaft Balances For information RSDP Reference Structure Design Principle For information RSE Recommendations for Safety Enhancement For information RSM Repair Station Manual For information RSP Responder Beacon For information RSP Risk Sharing Partner For information RSPL Recommended Spare Parts List For information RSR Route Surveillance Radar For information RSS Receiver Surveillance System Approved RSS Root Sum Square For information RSSELV Right Steering Selector Valve For information RST Reset Approved RSU Raster Shading Unit For information RSV Reserve Approved RSV Right Servo metering Valve For information RSVR Reservoir Approved RTA Receiver Transmitter ARINC For information RTBC Refuel and Towing on Battery Contactor Approved RTC Real Time Clock For information RTC Research & Technology Council For information RTCA Radio Technical Commission for Aeronautics For information RTDM Research & Technology Document Management For information RTE Route Approved RTF Radio Telephony For information RTF Rich Text Format For information RTF Requirement for Test Facilities For information RTF Record Tracking File For information RTG Rating For information RTG Research & Technology Group For information RTK Revenue Tonne Kilomètre For information RTL Rudder Travel Limiting For information RTLU Rudder Travel Limiting Unit For information RTM Real Time Monitoring Approved . RTM Resin Transfer Moulding For information RTN Return Approved RTNC Refuel and Towing on Normal Contactor Approved RTNR Retainer For information RTO Rejected TakeOff Approved RTOLW Regulatory TakeOff and Landing Weight Approved RTOW Regulatory TakeOff Weight Approved RTP Right Top Plug Approved RTR Router Approved RTRSW Rotary Switch For information RTRY Rotary Approved RTS Return to Seat Approved RTT Return To Tank Approved RTU Radar Transceiver Unit Approved RTU Rate of Turn Unit For information RUD Rudder Approved RVCP Remote Video Control Panel Approved RVDT Rotary Variable Differential Transducer Approved RVG Residual Value Guarantee For information RVR Runway Visual Range Approved RVS Reverse For information RVSM Reduced Vertical Separation Minimum Approved RVSN Reversion For information RVT Rotary Variable Transformer Approved RVT Rivet For information RW Ramp Weight For information RW Right Wing For information RWDS Rearwards Approved RWK Rework For information RWY Runway Approved RX Receive Approved RZ Return to Zero For information S Minimum Slat Retract Speed (EFIS) Approved S South Approved S Slats For information S/C Step Climb Approved S/D Step Descent Approved S/H Sample and Hold For information S/MECH Shortening Mechanism Approved S/N Serial Number Approved S/R Safety / Reliability For information S/W Software Approved S&OP Sales & Operations Planning For information SA Stress Analysis Approved SA Single Aisle For information SaaS Software as a Service For information SAC Single Annular Combustor For information SACU Stand Alone Compensator Unit Approved SACU Semi-Automatic Control Unit Approved SAD Stress Analysis Data Approved SAD Spares Advance Data For information SADF Spares Advance Data Form For information SAE Society of Automotive Engineers Approved SAF Safety Approved SAFD Safetied For information Safety PN Safety Professional Network For information . & Products for data processing For information SAP Safety Action Plan For information SAP BW SAP Business information Warehouse For information SAP ITS SAP Internet Transaction Server For information SAR Smart Access Recorder Approved SAREF Safety Requirements for Future For information SARI Safety Related Item For information SAS Static Strength Approval Sheet For information SAS Software Accomplishment Summary For information SAT Static Air Temperature Approved SATCOM Satellite Communication Approved SAV Starter Air Valve Approved SB Service Bulletin Approved SBB Swift Broadband Approved SBD Single Blade Door For information SBDB Service Bulletin Data Base For information SBEW Standard Basic Empty Weight For information SBI Service Bulletin Index For information SBIT Service Bulletin Information Telex Approved SBL Symbol For information SBR Service Business Representative For information SBS Service Bulletin Effectivity Schedule For information SBS Safety Barrier Strap For information SC Single Chime Approved SC Scale For information SC Source Code For information SC Steering Committee For information SC Security Committee For information SCAV Scavenge Approved SCCS Sub-Contract Control Sheet For information SCE Source Approved SCE Showing Compliance Engineer For information SCFM Standard Cubic Feet Minute of Gaseous Airflow For information SCG System Configuration Guide Approved SCH Schematic For information SCI Secure Communication Interface Approved SCI Supply Chain Integrator For information SCL Software Configuration Library For information SCL Software Control Library For information SCM SDU Configuration Module Approved SCN Specification Change Notice Approved SCO Section Control For information SCO Section Controller For information SCR Screw For information SCR Specification Change Request For information SCS Supplemental Cooling System Approved SCS Single Channel Simplex For information .SAL System Address Label Approved SALS Short Approach Light System For information SALSA Spot Array Light Supply Adapter Approved SAM Stress Analysis Manual Approved SAM Space Allocation Model For information SAM Specific Architecture MockUp For information SAN Software Assurance Nominee For information SAOHE Surface Air/Oil Heat Exchanger Approved SAP Systems. Applications. SCS Steering Control System For information SCS Supportability Candidate Sheet For information SCS Supplier Controlled Software For information SCU Supplemental Control Unit Approved SCU System Control Unit Approved SCUP Scupper For information SD System Display Approved SD System Drain For information SD Specification Dossier For information SD&AHWG Systems Design & Analysis Harmonisation Working For information Group SDAC System Data Acquisition Concentrator Approved SDAC System Data Analog Converter Approved SDAI STEP Data Access Interface For information SDAU Special Data Acquisition Unit For information SDB Signals Data Base For information SDB Source Data Base For information SDCU Smoke Detection Control Unit Approved SDD System Description Document For information SDDF Source Data Discrepancy Form For information SDF Smoke Detection Function Approved SDG Spares Data Guide For information SDGP Source Data Gathering process For information SDI Source Data Identifier For information SDI Source/Destination Identifier For information SDL Simple Data Loader Approved SDM Smart Diode Module Approved SDM Safety Data Management For information SDN System Description Note Approved SDOF Single Degree of Freedom Approved SDP Steering Disconnect Panel For information SDR Sealed Data Route For information SDS Smoke Detection System Approved SDS Software Definition Summary For information SDS Standard Data Sheet For information SDTM Structure Description Training Manual For information SDU Satellite Data Unit Approved SDU Seat Display Unit For information SDW Specific Design Work Approved SE Simplified English Approved SE Section For information SEAL Sealing Approved SEB Seat Electronic Box Approved SEB Service Evaluation Bulletin For information SEC Secondary Approved SEC SECondary Computer Approved SEC Securities and Exchange Commission For information SEC Spoiler Elevator Computer Approved SECI Software life cycle Environment Configuration Index For information SECT Section Approved SEG Segment For information SEL Select Approved SEL Selected Approved SEL Selection Approved SEL Selector Approved SELCAL Selective Calling Approved . SELV Selector Valve Approved SENS Sensitivity For information SEP Separator For information SEP Systems Evolution Plan For information SEPDC Secondary Electrical Power Distribution Center Approved SEQ Sequence Approved SEQ Sequential Approved SER Serial Approved SER Serial Number Approved SER/PRL Serial to Parallel For information SERNO Serial Number For information SES Support Equipment Summary Approved SES Supplier Equipment Specification For information SES Supportability Experience Sheet For information SET Setting Approved SF Spot Face For information SFAR Special Federal Aviation Regulation Approved SFC Specific Fuel Consumption Approved SFCC Slat Flap Control Computer Approved SFCC Sideways Facing Crew Cockpit For information SFCC Sideways Facing Crew Configuration For information SFE Seller Furnished Equipment Approved SFE Supplier Furnished Equipment For information SFE CODD Seller Furnished Equipment Contractual On Dock Date For information SFI Synthetic Flight Instructor For information SFPI Slats/Flaps Position Indicator For information SFS Shared Folder System For information SG Stroke Generator For information SG Starter Generator Approved SGCU Smart Galley Control Unit Approved SGCU Starter Generator Control Unit Approved SGHTNG RD Sighting Rods / Sighting Rod For information SGML Standard Generalized Markup Language For information SGP Stroke Generator Processor For information SGR Software Ground Repository For information SGSC Sheddable Ground Servicing Contactor Approved SGU Symbol Generator Unit Approved SH Sheet For information SH ABS Shock Absorber Approved SHADE Schedules Airbus Data Exchange For information SHAPE Shaping Airbus Process Excellence or Simplify. For information Harmonize-Align-Perform-Enable SHDBL Sheddable For information SHED Sheddable Approved SHED Shedding Approved SHKR Shaker For information SHLD Shield Approved SHLD Shielding Approved SHM Structural Health Monitoring For information SHN Scratch Hardness Number For information SHPNG Shipping For information SHRD Shroud For information SHR PN Shear Pin Approved SHT Short Approved SI Slip Indicator Approved . SI Systeme International For information SI Special Instruction For information SIAP Structural Inspection Adjustment Program For information SIB Security Information Base For information SIB Seat Interface Box For information SIB Safety Information Bulletin For information SIC System Isolation Contactor Approved SIC System Identity Card For information SICU System Interface Control Unit Approved SID Standard Instrument Departure Approved SID System Interface Definition For information SIDP System Installation Design Principles For information SIE Surface Industrielle Etendue For information SIF Selective Identification Feature For information SIF Spares Information File For information SIF Software Installation File For information SIG Signal Approved SIH Section Installed Harness For information SIL Speech Interference Level Approved SIL Service Information Letter Approved SIL Software Information Library For information SIM Simulation Approved SIM Single Integrated Manifold For information SIN Sine For information SIP System Integration Bench For information SIR Service Identification Request Approved SIRD System Installation Requirement Dossier For information SIRU Secure Interface Router Unit Approved SIS Standalone Identification System Approved SIS Spares Investment Study For information SISEN Significant In-Service Event Notification For information SISR Service IS Representative For information SIU Server Interface Unit Approved SIV Standard Item Variations For information SJC Standard Job Card For information SKT Socket Approved SL Sea Level For information SL Service Letter For information SLA Small Light Adapter Approved SLA Service Level Agreement For information SLC Starter Line Contactor Approved SLD Slide Approved SLD Sliding Approved SLI System Level Integration For information SLL Shelf Life Limitation For information SLM Service Level Management For information SLM Service Line Manager For information SLMC Service Life Limits and Maintenance Checks For information SLP Space Limited Payload For information SLR Service Level Requirement For information SLS Side Lobe Suppression For information SLS Shop Loadable Software For information SLS Slide Lever Switch For information SLT Slat Approved SLV Sleeve For information SLV Stipulated loss value For information . SM Standards Manual Approved SM3 Standard Manual Part 3 For information SMA Single Motor Actuator For information SMART Standard Modular Avionics Repair and Test For information SMC System Manager Controller Approved SMCR&T Senior Manager Center Research & Technology For information SME Subject Matter Expert For information SMEL Seat-Mounted Emergency Light For information SMIB Security Management Information Base For information SMK Smoke Approved SMKG Smoking Approved SML SB Modification Crossreference List For information SMM System Management Module Approved SMO Stabilized Master Oscillator For information SMQM Software Method and Quality Manager For information SMR Sealed Manufacturing Route For information SMS Safety Management System For information SN Serial Number Approved SNGL Single Approved SNIF Sensitivity for Normal Interface For information SNMP Simple Network Management Protocol Approved SNS Standard Numbering System For information SNSG Sensing Approved SNSR Sensor Approved SO Shutoff Approved SO2 Sulphur Dioxide For information SoC Statement of Conformity For information SOL Solenoid Approved SOM Supply Chain & Quality Operations Manager For information SOP Standard Operating Procedure For information SOR Statement Of Requirements For information SOS Sell or Scrap For information SOTM System Operation Training Manual For information SOV Shut-Off Valve Approved SOW Statement of Work For information SP Sampling For information SP Space For information SP Security Panel For information SPAD Scratchpad For information SPAN Supplier and Partners Airbus Network For information SPASE Single Point Audio System Earth For information SPATIAL System for Acquisition and Processing of ARINC and For information Logic SPB Seat Power Box Approved SPC Spare Parts Classification For information SPC Special Purpose Company For information SPC Smart PCMCIA Card Approved SPCA (Customer) Support Process Capability Assessment For information SPD Speed Approved SPD Single Product Definition For information SPD/M Speed-Mach For information SPDB Secondary Power Distribution Box Approved SPE Seller Purchased Equipment For information SPE Supplier Purchased Equipment For information SPEC Specification Approved SPF Specific Pathogen Free For information . SPF SuperPlastic Forming For information SPFK Specific For information SPI Schedule Performance Index For information SPKR Speaker Approved SPL Sound Pressure Level Approved SPLC Splice For information SPLR Spoiler Approved SPLY Supply Approved SPM Signal Processing Module Approved SPM Standard Practices Manual Approved SPMC Service Process Material Control For information SPMG Shorted Permanent Magnet Generator For information SPOARM Single POA Review Meeting For information SPOP Service Process Operation Procedure For information SPP Software Pin Programming Approved SPP Strategic Planning Process For information SPP-BA SPP Broadcasting Application Approved SPPF Software Pin Programming Function For information SPPU Station Position Pick-off Unit Approved SPR Service and Performance Report For information SPR Spar Approved SPRDR Spreader Approved SPRINT Systema de Production Integrado For information SPRT Support For information SPS Service Process Solution For information SPS Seat Power Supply Approved SPS/B Superseded by For information SPSA Supplier Product Support Agreement For information SPSS Seat Power Supply System Approved SPST Single Pole Single Throw Approved SPU Starter Power Unit Approved SQ Squelch Approved SQIP Supply Quality Improvement Programs For information SQW Square Wave For information SR Senior For information SR Safety Recommendations For information SRA Safety Risk Analysis For information SRC Strategic Research Center For information SRD Shorted Rotating Diode For information SRD System Requirement Document For information SRE Surveillance Radar Element of GCA For information SRF Servicing and aircraft condition parameters Reporting Approved Function SRI aircraft Structural Repair Identification Approved SRKL Structural Repair Kit List For information SRKM Structural Repair Kit Manual For information SRM Structural Repair Manual Approved SRM Supplier Relationship Managers For information SRP Safety / Reliability Plan For information SRPS Safe Redundant Power Supply Approved SRPSU Slide Release Power Supply Unit Approved SRPU Safe Redundant Power Unit Approved SRS Speed Reference System Approved SRU Shop Replaceable Unit Approved SS Sky/Shading For information SSA Side Slip Angle Approved . SSA System Safety Assessment For information SSA System Safety Analysis For information SSAD Sensitive Security Airworthiness Directive For information SSALS Simplified Short Approach Light System For information SSALSR Simplified Short Approach Light System Runway For information Alignment SSB Single Side Band Approved SSBFE Seller Supplied Buyer Furnished Equipment For information SSC Single Stroke Chime For information SSC Supplier Support Conditions For information SSCI Structure. System and Cabin Installation (Manager) For information SSCVR Solid State Cockpit Voice Recorder Approved SSEC Static Source Error Correction Approved SSFDR Solid State Flight Data Recorder Approved SSG Single Stroke Gong For information SSI Structural Significant Item For information SSI System and Structure Installation For information SSID Supplemental Structural Inspection Document For information SSID Service Set Identifier Approved SSIP Supplemental Structure Inspection Program For information SSM Sign Status Matrix Approved SSM Solid State Memory For information SSM Strategic Supplier Manager For information SSMM Solid State Mass Memory Approved SSO Single Sign-On For information SSP Significant In-Service Problems For information SSP System Specification For information SSP System Signal Processor Approved SSPC Solid State Power Controller Approved SSR Secondary Surveillance Radar For information SSSV Solid State Stored Voice For information SSTDU Side Stick Transducer and Damper Unit Approved SSTU Side Stick Transducer Unit Approved SSU Side Stick Unit Approved ST Station For information STA Station Approved STA Straight-in-Approach For information STAB Stabilizer Approved STAR Standard Terminal Arrival Route Approved STARTG Starting For information STAT Static Approved STBY Standby Approved STC Supplemental Type Certificate For information STCS STC holder Controlled Software For information STD Standard Approved STD Standard Data Sheet For information STDY Steady For information STELLA STair Electrical Light Load Adapter Approved STEP Standard for the Exchange of Product model data For information STG Stage For information STGR Stringer Approved STIF Stiffener For information STL Steel For information STL Stereolithography For information STL WARN Stall Warning For information STO Sustained Torsional Oscillation For information . Opportunities.STOM System Operation Training Manual For information STR Stringer Approved STRG Steering Approved STRK Stroke Approved STRL Structural For information STRM Secure open and Trip Resident Memory Approved STRM Short Term Review Meeting For information STRUCT Structure For information STS Status Approved STS Alignment Status For information STS Spares Technical Specification For information STWG Stowage Approved STWG Short-Term Working Group For information STYPPLE Sensitive Typical Phone Power Level For information SUBMUX Submultiplexer For information SUCNL ACTN Successional Action For information SUCT Suction Approved SUM Summing For information SUPPL Supplementary Approved SUPPR Suppressor Approved SUPSD BY Superseded by For information SURF Surface Approved SURV Surveillance For information SV Servovalve Approved SV Schedule Variance For information SVA Stator Vane Actuator Approved SVCE Service Approved SVMTR Servomotor For information SVO Servo Approved SW Switch Approved SW Software For information SWG Strategic Working Group For information SWOT Strenghts. Weaknesses. Threaths For information SWRD System Wiring Requirement Dossier For information SWRD-A System Wiring Requirements Dossier maturity A For information SWRD-B System Wiring Requirements Dossier maturity B For information SWRD-C System Wiring Requirements Dossier maturity C For information SWTG Switching Approved SWY Stopway For information SyA Systems Architect For information SyCDR System Critical Design Review For information SyCID System Configuration Index Document For information SyCMP System Configuration Management Plan For information SyCP System Certification Plan For information SyCR System Certification Review For information SyD System Designer For information SyDAL System Development Assurance Level For information SyDAS System Development Accomplishment Summary For information SYM Symmetry For information SYNC Synchro Approved SYNC Synchronize Approved SYN REF Synchro Reference For information SYNTHR Synthetizer Approved SYNTHR Synthesizer For information SyPAN System Process Assurance Nominee For information SYS System Approved . T Trim Approved T Turn Approved T True Approved T Thickness For information T/C Top of Climb Approved T/C Type Certificate For information T/D Top of Descent Approved T/F Track of a Fixed Waypoint Approved T/R Thrust Reverser Approved T/TISS Traffic and Terrain Integrated Surveillance System Approved T.O TakeOff Approved T&T Track & Trace For information T2C HP Compressor Inlet Temperature Approved T2CAS Traffic and Terrain Collision Avoidance System Approved T54 Low Pressure Turbine Inlet Temperature Approved TA Traffic Advisory Approved TA Twin Aisle For information TA Technical Adaptation For information TAB Tabulation and Interpolation Program For information TAB Test and Bite Panel For information TAC Taxiing Aid Camera Approved TAC Technical Acceptance Completion For information TACAN Tactical Air Navigation Approved TACH Tachometer Approved TACKV Trim Air Check Valve For information TACS Taxiing Aid Camera System Approved TACT Tactical Approved TACT Test Activity Control Team For information TADB Terrain/Airport DataBase For information TADD Trim Air Drive Device Approved TAKSY Technisch Administratives Konstruktionssytem For information TaMED Tank Modelling on Every Desk For information TAP Transient Acoustic Propagation For information TAP Technology Acquisition Portfolio For information TAPRV Trim Air Pressure Regulating Valve For information TAPS Trim Air Pressure Sensor For information TAR Terminal Area Surveillance Radar For information TAS True Airspeed Approved TAS Technical Approval Sheet For information TASOV Trim Air Shut Off Valve For information TAT Total Air Temperature Approved TAV Trim Air Valve For information TAWS Terrain Awareness and Warning System Approved TB Terminal Block Approved TBC To Be Confirmed Approved TBD To be Determined For information TBO Time Between Overhauls Approved TBSV Time Between Scheduled Visits For information TBU Time Base Unit For information TBV Transient Bleed Valve Approved TC HP Turbine Case Pressure Approved TC Theoretical Contour Approved TC Thermocouple Approved TC Takeoff Charts For information TC Type Certificate For information TCA Throttle Control Assy Approved . Quality. Quality.TCAC Total Cost At Completion For information TCAC Total Cost of Aircraft For information TCAP TCAS Resolution Advisory Prevention Approved TCAS Traffic Alert and Collision Avoidance System Approved TCC Thrust Control Computer Approved TCC Turbine Case Cooling Approved TCC Turbine Clearance Control Approved TCC Technology Capability Center For information TCCS Thrust Control Computer System For information TCDS Type Certificate Data Sheet For information TCFN Two's Complement Fractional Notation For information TCI Time Controlled Item For information TCIU Telephone Communication Interface Unit Approved TCM Thrust Control Malfunction Approved TCM Technical Coordination Meeting For information TCP Takeoff Charts Computation Program For information TCP Transmission Control Protocol For information TCQ Time. Cost. and Performance For information TCQPM Time. and Maturity For information TCS Temperature Control System Approved TCS TC holder controlled Software For information TCSB Transformer Coupled Serial Bus For information TCU Throttle Control Unit Approved TCU Transport Component Unit For information TCV Temperature Control Valve For information TD Technical Disposition For information TD Technical Dossier For information TD Time Delay For information TD Technical Deputy For information TDB Terrain DataBase Approved TDC Time Delay Closing For information TDCA Technical Data Control Assessment For information TDCA Technical Delegation Capability Assessment For information TDCR Type Design Change Request For information TDD Technical Design Directive Approved TDD Technical Data Download For information TDDO Tooling Definition Dossier For information TDF Tool Definition Form For information TDO Time Delay Opening For information TDP Touchdown Point For information TDS Technical Data Sheet Approved TDSC Technical Data Steering Committee For information TDU Technical Description Unit For information TDU Time Display Unit For information TDY Temporary Duty For information TDZL Touchdown Zone Lights For information TE HP Stage Air Temperature Approved TE Trailing Edge Approved TEC Turbine Exhaust Case Approved TED Tool and Equipment Drawing Approved TEDB Tool and Equipment Data Bank For information TEFO Total Engine Flame Out Approved TEG Technology Exchange Group For information TEI Tool and Equipment Index Approved TEL Telephone For information . Cost and Quality For information TCQP Time. Cost. Performance. TELECOM Telecommunications Approved TEM Tool and Equipment Manual Approved TEMP Temperature Approved TEMP Test and Evaluation Master Plan For information TEO Engine Oil Temperature Approved TER Trailing Edge Rib Approved TER Technical Event Report For information TEST SIG Test Signal For information TF Task Force For information TF Tuning File For information TFN Through Flow Nacelle For information TFR Transfer For information TFR Trouble and Failure Report For information TFTS Terrestrial Flight Telephone System Approved TFU Technical Follow-up Approved TG Task Group For information TGB Transfer Gearbox For information TGCU Terminal GPRS / UMTS Client Unit Approved TGL Touch-and-Go Landing For information TGT Target Approved TGT Turbine Gas Temperature Approved THD Thread For information THD Total Harmonic Distortion Approved THERAP Therapeutic Approved THMS Thermistor For information THR Thrust Approved THRM Thermal Approved THRMST Thermostat Approved THROT Throttle Approved THROT PUSH Throttle Pusher Approved THS Trimmable Horizontal Stabilizer Approved TI Technical Information For information TI Technical Instruction For information TI Track to an Interrupt For information TIA Type Inspection Authorization For information TIC Turbine Impingement Cooling Approved TICC Technical Information and Communication Committee For information TID Technical Impact Difference For information TID Technical Information Document For information TIE Technology Innovation Evolution For information TIFF Tagged Information File Format For information TIP Tactical Implementation Plan For information TIP Technology Integration Platform For information TIR Technical Incident Report For information TIR Type Inspection Report For information TIT Turbine Inlet Temperature Approved TIU Terminal Interface Unit Approved TIV Temperature Isolation Valve Approved TK Tank Approved TK Ground Track Angle For information TKE Track Angle Error Approved TKE Track Error For information TL Tooling List For information TL Transmittal Letter For information TLA Throttle Lever Angle Approved TLAR Top Level Aircraft Requirement For information . TLB Technical Log Book For information TLC Takeoff and Landing Chart Computation Program For information TLC TR Line Contactor Approved TLCS Trolley Lift & Conveyance System Approved TLMC Time Limits and Maintenance Checks For information TLR Top Level Requirement For information TLS Transcowl Locking System Approved TLS Trolley Lift System Approved TLSRD Top Level System Requirement Document For information TLU Travel Limitation Unit Approved TLV Tertiary Lock Valve Approved TM Torque Motor Approved TM Transportability Manual Approved TM Terminal Module For information TMA Terminal Control Area For information TMA Twin Motor Actuator For information TMC Target Must Cost For information TMG Timing For information TMLB Technical and Maintenance LogBook Approved TMR Timer Approved TMS Transport Management System For information TN Technical Note For information TNSN Tension / Tensioned / Tensioning/ To Tension For information To Mean Flight Time For information TO Takeoff For information TO Transfer Order For information TO/APPR Takeoff/Approach For information TOA Training Organization Approval For information TOC Table of Contents For information TOD Takeoff Distance For information TOGA Takeoff/Go Around Approved TOGW Takeoff Gross Weight Approved TOIL Toilet Approved TOL Tolerance Approved ToO Time of Occurence For information TOP Technology Offensive Program For information TOP Training and flight Operations Panel For information TOPA TakeOff Performance Application Approved TOR Takeoff Run For information TOS TakeOff Securing Approved TOT Total Approved TOT Transfer of Title For information TOW Takeoff Weight Approved TOW Towing For information TP Test Point For information TP Top Plug For information TP Technology Product For information T-P Turn Point For information TPA Technical Publications Agreement For information TPCI Technical Publications Combined Index For information TPG Technical Publications Guide For information TPGG Technical Publications General Guide For information TPIB Technical Publications Illustration Bank For information TPIC Tire Pressure Indicating Computer Approved TPIS Tire Pressure Indicating System Approved TPL Technology Product Leader For information . TPMM Technical Publications Management Meeting For information TPO Top Project Objectives For information TPOP Technical Publications Output Planning For information TPPP Technical Publications Production Planning For information TPR Turbofan Power Ratio Approved TPR Top Project Requirements For information TPRD Technical Publications Reference Document For information TPS Temporary Protection System Approved TPS Turbo Propulsion Simulation For information TPSL Top Product Structure Layout For information TPSP Third Party Software Provider For information TPU Terminal Processor Unit Approved TPWD Technical Publications Work Sharing Document For information TQM Total Quality Management For information TQWP Total Quality of Work Packages For information TR Temporary Revision For information TR Thrust Reverser Approved TR Transformer Rectifier Approved TR Transistor Approved TR Regulated Temperature (Downstream of precooler) For information TR Temporary Revision For information TR Truss For information TR Turn Radius For information T-R Transmitter-Receiver Approved TRA Throttle Resolver Angle Approved TRA Test Report Analysis For information TRACON Terminal Radar Control For information TRANS Transition Approved TRANSF Transfer For information TRANSLG Translating Approved TRC Thrust Rating Computer Approved TRDV Thrust Reverser Directional Valve Approved TreND Tree Navigated DMU For information TRF Turbine Rear Frame Approved TRGT Target Approved TRI Type Rating Instructor For information TRIG Trigger Approved TRK Track Approved TRL Technology Readiness Level For information TRLY Trolley Approved TROPO Tropopause Approved TRP Thrust Rating Panel Approved TRPU Thrust Reverser Power Unit Approved TRPV Thrust Reverser Pressurizing Valve Approved TRQE Torque Approved TRQR Torquer For information TRS Technical Repercussion Sheet For information TRT Turn Round Time For information TRTO Type Rating Training Organisation For information TRU Transformer Rectifier Unit For information TRU True For information TRV Travel Approved TS Trim Sheet For information TSA Throttle Sensor Angle Approved TSA Technical Service Agreement For information TSD Trouble Shooting Data Approved . TSDB Trouble Shooting Data Base For information TSDF Task Structured Data File For information TSE Trouble Shooting Extract For information TSF Trouble Shooting Function Approved TSFC Thrust Specific Fuel Consumption Approved TSH Trouble Shooting Handbook For information TSI Time Since Installation For information TSLSV Time Since Last Shop Visit For information TSM Trouble Shooting Manual Approved TSO Technical Service Order (FAA) For information TSO Technical Standard Order For information TSO Time Since Overhaul For information TSP Tank Signalling Processor Approved TSPA Tank Signal Processor A Approved TSPB Tank Signal Processor B Approved TST Test For information TSU Torque Sensor Unit Approved TT Trim Tank Approved TT Switching Temperature of HP Valve For information TT Total Time For information TTG Time to Go For information TTGA Time To Get an Answer For information TTGF Time To Get a Fix For information TTL Transistor Transistor Logic Approved TTL Task Team Leader For information TTOL Taxi. Takeoff and Landing Approved TTP Time Triggered Protocol bus For information TTR Technical Trouble Report For information TTS Trim Tank System Approved TU Tapping Unit Approved TUCD Thermostat Unit Control Device Approved TURB Turbine Approved TURB Turbulence Approved TURB Turbulent Approved TV Television Approved TVBC Turbine Vane and Blade Cooling Approved TVC Turbine Vane Cooling For information TVOR Short Range VOR For information TVOR Very High Frequency Terminal Omnirange Station For information TW Twisted For information TWDC Tank Wall Data Concentrator Approved TWE TAKSY Web Engine For information TWLU Terminal Wireless LAN Unit Approved TWR Tower For information TWY Taxiway For information TX Transmission (TCAS to Transponder) For information TX Transmit Approved TXW Taxi Weight For information TYP Typical Approved TYPPLE Typical Phone Power Level For information Ú Pitch Attitude For information U/FLOOR Underfloor Approved U/S Unserviceable Approved UAC Upper Area Control Centre For information UADF User Application Definition File Approved UART Universal Asynchronous Receiver Transmitter For information . UAT User Acceptance Test For information UCS User Certifiable Software For information UD Upper Deck Approved UD Document Unit ("Unité Documentaire") For information UD Uni-Directional Tape For information UDC Upper Deck Cargo For information UDCC Upper Deck Cargo Compartment Approved UDCD Upper Deck Cargo Door Approved UDL Unit Detail Listing For information UDP User Datagram Protocol Approved UEB Underseat Electronic Box Approved UERF Uncontained Engine Rotor Failure Approved UF Underfrequency Approved UHF Ultra High Frequency Approved UICDL User Interface Configuration Download List Approved ULA Universal Light Adapter Approved ULA M Universal Light Adapter Module Approved ULB Underwater Locator Beacon Approved ULD Unit Load Device Approved ULD Underwater Locating Device For information ULLI Understep LED Light For information ULM Ultra Low Maintenance For information UMS User Modifiable Software Approved UMTS Universal Mobile Telecommunications System Approved UNBAL Unbalance Approved UNBAL Unbalanced Approved UNCPLG Uncoupling For information UNCRCTD Uncorrected For information UND Under Approved UNDERPRESS Underpressure Approved UNFCCC United Nation Framework Convention on Climate Change For information UNIV Universal Approved UNLK Unlock Approved UNLKD Unlocked Approved UNSD Unused For information UP Unified Planning For information UP-Dev Unified Planning for Development For information UPLK Uplock Approved UPLKD Uplocked Approved UPPR Upper Approved UPR Upper Approved UP-Series Unified Planning for Series For information UR Utilization Rate For information URL Uniform Resource Locator For information US Under Speed For information US United States For information US Upstream For information USB Universal Serial Bus Approved USB Upper Sideband Approved UTA Upper Control Area For information UTC Universal Time Coordinated Approved UUT Unit Under Test For information UV Ultra-Violet Approved UV Under Voltage Approved UVEROM Ultra Violet Erasable Read Only Memory For information . UWBS Universal Wireless Backbone System Approved UWF Under Wing Fitting For information UWY Upper Airway For information V Valve Approved V Violet For information V/L VOR/LOC For information V/L VOR/Localizer For information V/S Vertical Speed Approved V&V Validation & Verification For information V&V Verification & Validation For information VAC Voltage Alternating Current Approved VACBI Video and Computer-Based Instruction For information VACU Vacuum Approved VAFN Variable Area Fan Nozzle Approved VALDN Validation For information VAP Visual Approach Procedure For information VAR Variable Approved VAR Variation Approved VAR Visual-Aural Radio Range For information VAR LEV HTY Variable Lever Healthy For information VASIS Visual Approach Slope Indicator System For information VB Virtual Bundel For information VBV Variable Bleed Valve Approved VC Ventilation Controller Approved VCC Video Control Center Approved VCI Video Control Insert Approved VCM Video Camera Module Approved VCO Voltage Controlled Oscillator Approved VCP Video Control Panel Approved VCRU Vapor Cycle Refrigeration Unit Approved VCS Ventilation Control System Approved VCTREND Airspeed Tendency For information VCU Video Control Unit Approved VD Design Diving Speed For information VD Heading to a DME Distance For information VDAR Virtual DAR Approved VDC Voltage Direct Current Approved VDEV Vertical Deviation Approved VDF Very High Frequency Direction Finding Station For information VDOS Vendor Documentation On-line Service For information VDR VHF Data Radio Approved VDU Video Display Unit Approved VEADB Video on demand Enhanced Area Distribution Box For information VEL Velocity Approved VENT Ventilation Approved VERT Vertical Approved VERT REV Vertical Revise For information VF Virtual Flight For information VFF Virtual First Flight For information VFG Variable Frequency Generator Approved VFR Visual Flight Rules Approved VFTO Final Takeoff Speed For information VG Vertical Gyro For information VGM Versatile Graphical Module Approved VHCU Versatile Heating Control Unit Approved VHDU Versatile Heating Data Unit Approved . VSV Variable Stator Vane Approved VSVA Variable Stator Vane Actuator Approved VSWR Voltage Standing Wave Ratio Approved VT Vertical Tail For information VtB Value to Business For information VTP Vertical Tail Plane For information VTR Video Tape Reproducer Approved VTS Vacuum Toilet System Approved VV Velocity Vector Approved VVO Verification and Validation Objective For information VWM Vendor Warranty Manual For information .VHF Very High Frequency Approved VHV Very High Voltage Approved VIB Vibration Approved VIM Vendor Information Manual For information VIMU Video Multiplexer Unit Approved VIP Virtual Integration Platform For information VL Virtual Link Approved VLF Very Low Frequency Approved VLLDC Very Low Level DC Voltage For information VLSI Very Large Scale Integrated For information VLV Valve Approved VM Voltmeter Approved VMC Visual Meteorological Conditions For information VMI Vendor Managed Inventory For information VMU Video Modulator Unit Approved VoC Voice of the Customer For information VOC Voltage Open Circuit For information VOCs Volatile Organic Compounds For information VOD Video On Demand Approved VODDSU VOD Data Server Unit Approved VODMU VOD Modulator Unit Approved VODSU VOD Server Unit Approved VOL Volume Approved VOR VHF Omnidirectional Range Approved VOT Voter For information VOZC Volatile Organic Compound and Ozone Converter For information VPN Virtual Private Network For information VPSA Vendor Product Support Agreement For information VQAR Virtual QAR Approved VR Rotation Speed Approved VR Voltage Regulator For information VRU Video Reproducer Unit Approved VSB Vendor Service Bulletin Approved VSBN Vendor Service Bulletin Number For information VSBT Vendor Service Bulletin Title For information VSC Vacuum System Controller Approved VSCF Variable Speed Constant Frequency Approved VSCU Video System Control Unit For information VSD Vertical Situation Display For information VSEB Video Seat Electronic Box Approved VSG V Shape Galley For information VSI Vertical Speed Indicator Approved VSM Value Stream Mapping For information VS-NfD Verschlusssache .Nur für den Dienstgebrauch (German For information equivalent to NATO restricted). Inhibition .Clear For information WLAN Wireless Local Area Network Approved WLC Wing Lower Cover Approved WLDP Warning Light Display Panel Approved WLG Wing Landing Gear Approved .W West Approved W White Approved W Weight For information W Wire For information W/O Work Order For information W/V Wind Direction and Speed For information W3C World Wide Web Consortium For information WA Wind Angle For information WABSIC Wheel And Brake System Integrated Component Approved WACC Weighted Average Cost of Capital For information WACS Wireless Airport Communication System Approved WAI Wing Anti-Ice Approved WAP Wireless Access Point Approved WARN Warning Approved WASG World Airlines and Suppliers Guide For information WATOG World Airlines Technical Operations Glossary For information WB Wide Body For information WBA Weight and Balance Application Approved WBBC Weight and Balance Backup Computation Approved WBC Weight & Balance Computer Approved WBM Weight and Balance Manual Approved WBS Weight and Balance System Approved WBS Work Breakdown Structure For information WC Wording Change For information WCR Weight and Balance Compliance Report For information WD Warning Display Approved WD Wing Datum Approved WD Wiring Diagram Approved WDB Wall Disconnect Box Approved WDI Wind Direction Indicator For information WDM Wiring Diagram Manual Approved WDO Window For information WEFA Wireless Extension For AIDS For information WEL Wall Emergency Light For information WFD Widespread Fatigue Damage For information WFOV Wide Field of View Approved WG Wing Approved WG Wave Guide For information WG Working Group For information WGD Windshield Guidance Display Approved WGDC Windshield Guidance Display Computer Approved WGDS Windshield Guidance Display System Approved WGL Wireless Ground Link Approved WHC Window Heat Computer Approved WHL Wheel Approved WINDML Windmilling Approved WIP Wing Ice Protection Approved WIP Work In Progress For information WIPCU Water Ice Protection Control Unit Approved WIPDU Water Ice Protection Data Unit Approved WIPS Wing Ice Protection System Approved WIRC Warning .Recall . WLM Wireless LAN Manager Approved WLP Weight Limited Payload For information WLU Wireless LAN Unit Approved WM Wattmeter For information WM Wiring Manual For information WMEL Wall Mounted Emergency Light Approved WMS Warehouse Management System For information WO Wash-out For information WO Work Order For information WoffW Weight off Wheels Approved WOJ Weight on Jacks Approved WOR Wear Out Rate For information WOW Weight On Wheels Approved WP Work Package For information WPD Work Package Description For information WPS Workpackage Specification For information WPT Waypoint Approved WPV Water Pulse Valve For information WR Weather Radar For information WR Weighing Report For information WRDC Wheel Remote Data Concentrator Approved WRG Wiring Approved WRK Work Approved WRK Working Approved WRM Weight Review Meeting For information WS Wind Speed For information WS Wireless System Approved WSC Window Shade Controller Approved WSCP Warning and System Control Panel For information WSCS Wheel Steering Control System Approved WSDP Warning and System Display For information WSHLD Windshield Approved WSR Weekly Service Report For information WSSG Warning System Symbol Generator Approved WT Weight Approved WT Wind Tunnel For information WTB Wing Tip Brake Approved WTR Water Approved WTT Wind Tunnel Testing For information WUC Work Unit Cost For information WUC Wing Upper Cover For information WV Weight Variant For information WX Weather Mode (ND) Approved WXR Weather Radar Approved X Cross Approved X Trans Approved XARM Cross Arm For information XBAR Crossbar Approved X BLEED Crossbleed Approved XCHECK Crosscheck Approved XCVR Transceiver Approved XDCR Transducer Approved X FEED Crossfeed Approved XFMR Transformer Approved XFR Transfer Approved XING Crossing Approved . X LINE Crossline Approved XLOAD Crossload Approved XLTR Translator Approved XML Extensible Mark-up Language For information XMSN Transmission Approved XMTR Transmitter Approved XPDR Transponder Approved XPNDR Transponder For information XREF Crossreference For information XSEC Extra Section For information XT Reception (Transponder to TCAS) For information XTAL Crystal For information X-TALK Cross-talk Approved XTK Cross Track Deviation For information XTK Cross Track Distance For information XTK Cross Track Error For information X VALVE Cross Valve Approved XWIND Crosswind Approved Y Yellow Approved Y/C Economy Class Approved YC Tourist Class For information YCF Economy Class-Front For information YCL Economy Class Front For information YCR Economy Class-Rear For information YE Year For information YES Yankee Escape System For information YTPPP Yearly Technical Publications Processing Planning For information Z Greenwich Mean Time Approved Z Zone Approved ZAPDI Zonal Access Panel and Door Identification For information ZC Zone Controller Approved ZFCG Zero Fuel Center of Gravity Approved ZFW Zero Fuel Weight Approved ZSA Zonal Safety Analysis For information .