A
A Absolute
A Alaskan Standard Time
A Amber
A Arctic (air mass)
A&E Architecture and Engineering
A&P Airframe and Powerplant
A/A Air to Air
A/C Aircraft
A/C Approach Control
A/G Air to Ground
A/H Already had
A/H Altitude/Height
AAA Airport Airspace Analysis
AAC Alaskan Air Command
AAC Mike Monroney Aeronautical Center
AAD Assigned Altitude Deviation
AADC Airport Average Daily Capacity
AADC Approach and Departure Control
AAF Airway Facilities Service
AAF Army Air Field
AAF-1 Director of Airway Facilities
AAG Alaska Aviation Guidance
AAI Arrival Aircraft Interval
AAI Airport Authority of India
AAI FAA Office of Accident Investigation
AAITVL Arrival Aircraft Interval
AAL Above Aerodrome Level
AAL Alaska Region
AAL Alaskan Region
AAM Office of Aerospace Medicine
AAM Air-to-Air Missile
AAMS Aircraft Arrival Management System
AAP Advanced Automation Program
AAP Advise if Able to Proceed
AAR After Action Review
AAR Airport Acceptance Rate
AAR Airport Arrival Rate
AAR Airport and Aircraft Safety Research and Development
AARTE Airport Acceptance Rate
AAS Advanced Automation System
AAS Airport Advisory Service
AASR Aging Aircraft Safety Rule
AAT Associate Administrator for Air Traffic
AATM At all times
AATS Aircraft Access to SWIM
AAUP Attention All Users Page
AAWF Auxiliary Aviation Weather Facility
AAWTA Advise at what time able
AAWU Alaska Aviation Weather Unit
AB Airborne
AB Afterburner
ABA FAA Office of Financial Services
ABA Office of Budget
ABBR Abbreviate
ABC After Bottom Center
ABCST Automatic broadcast
ABD Aboard
ABDIS Automated Data Interchange System Service
ABI Advance Boundary Information
ABLCHG Airborne Launching
ABM Abeam
ABN Aerodrome Beacon
ABND Abandon
ABNDT Abundant
ABNML Abnormal
ABS Absolute
ABT About
ABV Above
AC Advisory Circular
AC Altocumulus
AC Assistant Chief
AC Alternating Current
AC Air Corps (no longer commonly used)
AC Convective Outlook
A/C Air Conditioning
ACA Artic Control Area
ACAA Air Carrier Association of America
ACAIS Air Carrier Activity Information System
ACARS Aircraft Communication Addressing and Reporting System
ACAS Airborne Collision Avoidance System
ACAS Aircraft Collision Avoidance System
ACC Airports Consultants Council
ACC Altocumulus Castellanus
ACC Area Control Center
ACC Active Clearance Control
ACCEL Acceleration
ACCID Notification of Aircraft Accident
ACCT Account
ACCT Accounting Records
ACCUM Accumulate
ACD Automatic Call Distributor
ACDNT Accident
ACDO Air Carrier District Office
ACE Central Region
ACEP Airport Capacity Enhancement Plan
ACES Access
ACESS Advanced Cabin Entertainment and Service System
ACF Area Control Facility
ACFO Aircraft Certification Field Office
ACFT Aircraft
ACID Aircraft Identification
ACI-NA Airports Council International-North America
ACIP Airport Capital Improvement Plan
ACIP Automated Conformity Inspection Process
ACK Acknowledge
ACL Altimeter Check Location
ACLD Above Clouds
ACLS Automatic Carrier Landing System
ACLT Accelerate
ACLT Actual Calculated Landing Time
ACM Air Combat Maneuvers
ACM Air Cycle Machine
ACM Airport Certification Manual
ACMI Air Combat Maneuvering Instrumentation
ACMS Aircraft Condition Monitoring System
ACN Aircraft Classification Number
ACN All Concerned Notified
ACNOT Accident Notice
ACO Aircraft Certification Office
ACO Associate Contracting Officer
ACO Office of Airports Compliance and Field Operations
ACP Acceptance (Message Type Designator)
ACP Area Command Post
ACPT Accept
ACPY Accompany
ACR Air Carrier
ACR FAA Office of Civil Rights
ACR Airman Certification Representative
ACRBT Acrobatic
ACRP Airport Cooperative Research Program
ACRS Across
ACS Airman Certification Standards
ACSEP Aircraft Certification Systems Evaluation Program
ACSL Standing Lenticular Altocumulus
ACT Active
ACT Activated
ACT Activity
ACT Air Combat Training
ACT Technical Center
ACT Active Control Technology
ACT William J. Hughes Technical Center
ACTG Acting
ACTV Active
ACTVT Activate
ACU Acceleration Control Unit
ACU Antenna Coupling Unit
ACW Aircraft Control and Warning
ACYC Anticyclonic
AD Aerodrome
AD Aircraft Dispatcher
AD Airworthiness Directive
A/D Analog-to-Digital
A/D Conv Analog-to-Digital Converter
ADA Advisory Area
ADA Air Defense Area
ADAP Airport Development Aid Program
ADAS Automated Weather Observing System Data Acquisition System
ADAS AWOS Data Acquisition System
ADC Aerodrome chart
ADC Air Defense Command
ADC Air Data Computer
ADCCP Advanced Data Communications Control Procedure
ADCF Air Defense Control Facility
ADCON Advise or issue instructions to all concerned
ADCUS Advise Customs
ADDA Administrative Data
ADDN Addition
ADDS Aviation Digital Data Service
ADE Air Defense Emergency
ADE Aircrew Designated Examiner
ADEU Automatic Data Entry Unit
ADF Automatic Direction Finder
ADF Automatic Direction Finding
ADFAP Automatic Direction Finder Approach
ADI Automatic De-Ice and Inhibitor
ADI Antidetonation Injection
ADI Attitude Director Indicator
ADIC ATS Interfacility Data Communications
ADIN AUTODIN Service
ADIZ Air Defense Identification Zone
ADJ Adjacent
ADL Aeronautical Data Link
ADL Aggregate Demand List
ADLO Air Defense Liaison Office
ADLO Air Defense Liaison Officer
ADLY Arrival Delay
ADM Aeronautical Decision Making
ADMA Aviation Distributors and Manufacturers Association
ADMAP Advise by air mail as soon as possible
ADMIN Administration
ADMIR Administrator
ADMIS (Number) Aircraft Departing at (number of minutes) Interval
ADMIV Administrative
ADNL TFC Additional Traffic
ADNOK Advise if not correct
ADO Aerodrome Office
ADO Airline Dispatch Office
ADO Airport District Office
ADP Automated Data Processing
ADPE Automatic Data Processing Equipment
ADPS Automatic Data Processing Systems
ADQT Adequate
ADR Advisory Route
ADR Airport Departure Rate
ADRDE Advise Reason for Delay
ADRNDCK Adirondack
ADRT Alternate Departure Route
ADS Address
ADS Air Defense Sector
ADS Automated Distribution System
ADS Automatic Dependent Surveillance
ADS-B Automatic Dependent Surveillance-Broadcast
ADSB Automatic Dependent Surveillance-Broadcast
ADSIM Airfield Delay Simulation Model
ADSPN Advise Disposition
ADSU Automatic Dependent Surveillance Unit
ADSY Administrative Equipment Systems
ADTN Administrative Data Transmission Network
ADTN2000 Administrative Data Transmission Network 2000
ADV Advise
ADV Air Defense Version
ADVALT Allotment advice
ADVC Advice
ADVCTN Advection
ADVN Advance
ADVO Administrative Voice
ADVSRY Advisory
ADVY Advisory
ADVZY Advisory
ADW Air Defense Warning
ADZ Advise
ADZAR Advise Arrival
ADZI Advise Intentions
ADZOF Advise This Office
ADZY Advisory
AEA Eastern Region
AEA Aircraft Electronics Association, Inc.
AED Automated External Defibrillator
AEDT Aviation Environmental Design Tool
AEE FAA Office of Environment and Energy
AEEC Airlines Electronic Engineering Committee
AEG Aircraft Evaluation Group
AEM Aircraft and Engine Mechanic
AEM Audio Entertainment Multiplexer
AENG Airways Engineer
AEP FAA Office of Aviation Policy Planning and Environment
AER Approach End Runway
AERA Automated En-Route Air Traffic Control
AERO Aeronautical
AES Aircraft earth station
AEU Europe, Africa, and Middle East Office
AEVAC Air Evacuation
AEW Airborne Early Warning
AEX Automated Execution
AF Air Force
AF Airway Facilities
AF Audio Frequency
AFA Air Force Assosiation
AFA Association of Flight Attendants
AFB Air Force Base
AFC Area Forecast Center
AFC Automatic Frequency Control
AFCS Automatic Flight Control System
AFCT Affect
AFD Airport/Facilites Directory
A/FD Airport/Facilites Directory
AFDK After Dark
AFDS Air Fix Data Sub Set
AFDSS Air Fix Data Sub Set
AFDS Autopilot Flight Director System
AFER Aircraft Fuel Expense Reconciliation System
AFIL Filed Flight Plan in the Air
AFIO Authorization for Interceptor Operations
AFIRM Affirmative
AFIS Aerodrome Flight Information Service
AFIS Automated Flight Inspection System
AFIS Automatic Flight Information Service
AFJ Air Force Jet
AFM Affirmative
AFM Aircraft Flight Manual
AFMS Automatic Flight Management System
AFMT Airway Facilities Management Team
AFNEA Air Force NOTAM Exchange Area
AFNEO Air Force NOTAM Exchange Office
AFO Airport Field Office
AFOVRN Air Force Overrun
AFP Airspace Flow Program
AFP Area Flight Plan
AFREP Air Force Representative
AFRES Air Force Reserve Station
AFRT Air Freight
AFS Aeronautical Fixed Service
AFS Airport Flight Standards
AFS Airways Facilities Sector
AFS Flight Standards Service
AFS Autoflight System
AFS Air Force Station
AFSFO AFS Field Office
AFSFU AFS Field Unit
AFSOU AFS Field Office Unit (Standard is AFSFOU)
AFSS Automated Flight Service Station
AFT After
AFTI Advanced Fighter Technology Integration
AFTIL Airway Facilities Tower Integration Laboratory
AFTN Aeronautical Fixed Telecommunications Network
AFTN Afternoon
AFTN Automated Fixed Telecommunications Network
AFVG Anglo-French Variable Geometry
AFZ Resource Management
AG Air Ground
A/G Air Ground
AGA Aerodromes and Ground Aids
AGACS Automatic Ground Air/Ground Communication System
AGB Accessory Gear Box
AGC Automatic Gain Control
AGC FAA Office of the Chief Counsel
A-GEAR Arresting Gear
AGHME Aircraft Geometric Height Measurement Element
AGI Advanced Ground Instructor
AGI FAA Office of Government and Industry Affairs
AGL Above Ground Level
AGL Alliance Great Lakes Region
AGL Great Lakes Region
AGM Air-to-Ground Missile
AGN Again
AGR Agree
AGRMT Agreement
AGS Automatic Gain Stabilization
AHD Ahead
AHR FAA Office of Human Resources
AHRS Attitude and Heading Reference System
AI Aeronautical Information
AI Arrival Approved Request for IFR Flight
AI Attitude Indicator
AIA Advise if Able
AIA Aerospace Industries Association of America Inc.
AIAA American Institute of Aeronautics and Astronautics, Inc.
AIATSC All International Air Traffic Switching Centers
AIC Aeronautical Information Circular
AICS Aircraft Inventory and Charter System
AID Airport Information Desk
AIDC Air Traffic Services Inter-facility Data Communication
AIDS Airborne Integrated Data System
AIFP Activate IFR Flight Plan
AIFSS Automated International Flight Service
AIG Airbus Industries Group
AIL Aileron
AILS Automatic Instrument Landing System
AIM Aeronautical Information Management
AIM Aeronautical Information Manual
AIM Airman's Information Manual
AIM Avalanche-Induced Migration
AIMS Advanced Integrated Manufacturing System
AIP Aeronautical Information Publication
AIP Airport Improvement Plan
AIP Airport Improvement Program
AIPA Aeronautical Information Production Application
AIR Aircraft Certification Service
AIRAC Aeronautical Information Regulation and Control
AIRCOMNET Air Force Communications Network
AIREP Air Report
AIRFL Air Refueling
AIRMET Airmen’s Meteorological Information
AIRNAV Airports and Navigation Aids Database System
AIRNET Airport Network Simulation Model
AIROPNET Air Operations Network
AIRPAC Advisor for the Intelligent Resolution of Predicted Aircraft
AIS Aeronautical Information Service
AIS Aeronautical Information Specialist
AIS Aeronautical Information System
AIS Airborne Instrumentation System
AIS Airport in Sight
AIS FAA Office of Information Systems Security
AISI American Iron and Steel Institute
AIT Automated Information Transfer
AITS Automated Inventory Tracking System
AIXM Aeronautical Information Exchange Model
AJA Acquisition & Business Services, Air Traffic Organization
AJC Communications Services, Air Traffic Organization
AJE En Route & Oceanic Service, Air Traffic Organization
AJF Finance Services, Air Traffic Organization
AJO Chief Operating Officer, Air Traffic Organization
AJP Operations Planning Services, Air Traffic Organization
AJR System Operations Services, Air Traffic Organization
AJS Safety Services, Air Traffic Organization
AJT Terminal Service, Air Traffic Organization
AJW Technical Operation Services, Air Traffic Organization
AK Alaska
AKTR Airman Knowledge Test Report
AL All Field Offices and Personnel
AL All (When used as prefix)
AL Annual leave
AL/(Number) At Least (Altitude)
AL Autoland
AL Approach and Landing
A/L Autoland
ALA Alighting Area
ALA Aircraft Load Agent
ALACFO All Air Carrier Field Offices
ALADLO All Air Defense Liaison Officers in Service Area
ALAFFO All Technical Operations
ALANO All Accident Notice Offices
ALAR Approach and Landing Accident Reduction
ALARM Air-Launched AntiRadiation Missile
ALARTC All Air Route Traffic Control Centers in Service Area
ALAT All Air Traffic Service Personnel in Service Area
ALATAS All Air Traffic (Area) Supervisors in Service Area
ALATF All Air Traffic Field Facilities
ALATFO All Air Traffic Field Offices
ALCKT All offices having send−receive teletypewriter service on circuit
ALCS/C All Air Traffic Combined Station/Centers in Service Area
ALCS/T All Air Traffic Combined Station/Towers in Service Area
ALCT Attempt to Locate
ALD Available Landing Distance
ALDA Air Line Dispatchers Association
ALERFA Alert Phase Code (Alerting service)
ALF Aloft
ALFAB All offices on NADIN
ALFSFO All flight standards field offices
ALFSS All flight service stations in service area
ALG Along
AL-GATE MOS Aluminum-Gate Metal Oxide Silicon Semiconductor
ALGHNY Allegheny
ALIATSC All International Aeronautical Telecommunication Switching Centers
ALIFO All International Field Offices
ALIFSS All International Flight Service Stations in Service Area
ALNMT Alignment
ALNOT Alert Notice
ALO Aviation Logistics Organization
ALOFT Airbone Light/Optical Fiber Technology
ALP Airport Layout Plan
ALPA Air Line Pilots Association
ALPA Airlines Pilots Association
ALQDS All Quadrants
ALR Alerting
ALRAFAC All Radar Facilities in Service Area
ALRGN All Regional/Service Area Offices
ALRS Arithmetic and Logic Register Stuck
ALS Approach Light System
ALS Approach Lighting System
ALSEC All Sectors
ALSF Approach Lighting System With Sequenced Flashing Lights
ALSF1 Approach Lighting System With Sequenced Flashers Cat 1
ALSF-1 Approach Lighting System With Sequenced Flashers Cat 1
ALSF2 Approach Lighting System With Sequenced Flashers Cat 2
ALSF-2 Approach Lighting System With Sequenced Flashers Cat 2
ALSFI Approach Lighting System With Sequenced Flashers Cat 1
ALSF-I Approach Lighting System With Sequenced Flashers Cat 1
ALFSII Approach Lighting System With Sequenced Flashers Cat 2
ALSF-II Approach Lighting System With Sequenced Flashers Cat 2
ALSIP Approach Lighting System Improvement Plan
ALSTG Altimeter Setting
ALT Altitude
ALT HOLD Altitude Hold
ALTA Alberta
ALTM Altimeter
ALTN Alternate Airport/Aerodrome
ALTPT Alternate Airport
ALTRV Altitude Reservation
ALTWR All Towers in Service Area
ALU Arithmetic and Logic Unit
ALUTN Aleutian
ALWF Actual Wind Factor
AM Ante Meridiem (Before Noon)
AM Amplitude Modulated
AMA Area Minimum Altitude
AMA Aviation Mechanic Airframe
AMAD Aiframe Mounted Accesory Drives
AMASS Airport Movement Area Safety System
AMB Ambiguity
AMC Air Mobility Command
AMC Mike Monroney Aeronautical Center
AMCC ACF/ARTCC Maintenance Control Center
AMCC Air Route Traffic Control Center Maintenance Control Center
AMCL Amended Clearance
AMD Amend/Amended Forecast
AMDAR Aircraft Meteorological Data Relay
AMDT Amendment
AME Aviation Medical Examiner
AMECH Account Mechanical
AMED Advanced Mechanical Engine Demonstrator
AMEL Airplane Multi-Engine Land
AMES Airplane Multi-Engine Sea
AMETS Airplane Maintenance Engineering Time Standard
AMGR Airport Manager
AMIC Area Manager in Charge
AMIS Aircraft Management Information System
AMIS Aircraft Movement Information Services
AMOC Alternative Methods of Compliance
AMOS Automated Meteorological Observation Station
AMOS Automatic Meteorological Observing System
AMP Amplifier or amplify
AMP Ampere
AMP ARINC Message Processor (OR) Airport Master Plan
AMP Aviation Mechanic Powerplant
AMPLTD Amplitude
AMRF Amended Route of Flight
AMS Acquisition Management System
AMS Aeronautical Mobile Service
AMS Air Mass
AMS American Meteorological Society
AMS Aeronautical Materials Specifications
AMSL Above Mean Sea Level
AMSS Aeronautical Mobile Satellite Service
AMT Amount
AMT Aviation Maintenance Technician
AMTS Aviation Maintenance Technician School
AMVER Automated Mutual Assistance Vessel Rescue System
AN Air Force-Navy or Army-Navy
ANA All Nippon Airways
ANC Aeronautical Chart
ANC Alternate Network Connectivity
ANCA Airport Noise and Capacity Act
ANCPT Anticipate
ANCS Aeronautical Navigation Chart Small Scale
AND Associate Administrator for NAS Development
ANE New England Region
ANF Air Navigation Facility
ANG Air National Guard
ANGB Air National Guard Base
ANLYS Analysis
ANM Northwest Mountain Region
ANMS Automated Network Monitoring System
ANMS Automatic Network Management System
ANNC Announce
ANP Actual Navigation Performance
ANR Actual Navigation Route
ANR Advanced Navigation Routes
ANRA Air Navigation Radio Aids
ANS Answer
ANS NAS Transition and Integration Directorate
ANS NAS Transitions and Implementation
ANSI American National Standards Institute
ANSP Air Navigation Service Provider
ANT Antenna
AO Authorizing Official
AO1 ASOS Automated Observation without Precipitation Discriminator (rain/snow)
AO2 ASOS Automated Observation with Precipitation Discriminator (rain/ snow)
AOA Air Operations Area
AOA Airport Operating Area
AOA At or Above
AOA Angle of Attack
AOA FAA Office of the Administrator
AOAF At or After
AOAS Advanced Oceanic Automation System
AOB At or Below
AOBF At or Before
AOC Aerodrome Obstacle Chart
AOC Airline Operational Control
AOC Airport Operating Certificate
AOC FAA Office of Communications
AOCC Airline Operations Control Center
AOCC Atlantic Operations Control Center
AOCP Aircraft Out of Commission for Parts
AODR Authorizing Official Designated Representative
AOE Airport of Entry
AOG Aircraft on the Ground
AOP NAS Operations
AOPA Aircraft Owners and Pilots Association
AOS Operational Support Service
AOSS After Over Station Sensor
AOV Air Traffic Safety Oversight Service
AP Acquisition Plan
AP Airport
AP Autopilot
AP Anomalous Propagation
APAP Approach Path Alignment Panel
APAP This list is copywritten and belongs to proairpilot
APAPI Abbreviated Precision Approach Path Indicator
APB Acquisition Program Baselines
APC Area Positive Control
APC Absolute Pressure Controller
APCH Approach
APCU Auxiliary Power Control Unit
APD Aircrew Program Designee
APDC Aircraft Parking/Docking Chart
APFDS Autopilot and Flight Director System
API FAA Office of International Aviation
API American Petroleum Institute
APL Airport Lights
APLCN Appalachian
APM Approach Path Monitor
APMS Automatic Performance and Mangement System
APN Apron
APNT Appoint
APP Approach
APP Approach Control
APP Approach Control Office
APP CON Approach Control
APP CRS Approach Course
APPA Advise Present Position and Altitude
APPR Appear
APR Airports Program Report
APREQ Approval Request
APRNT Apparent
APROP Appropriate
APRX Approximate
APS Altitude Preselect
APS Airborne Pulse Search Radar
APS Airport Planning Standard
APSB Altitude Preselect Bracket
APSG After Passing
APT Airport
APTS Automated Personnel Tracking System
APTS AVN (Aviation Systems Standards) Process Tracking System
APU Auxiliary Power Unit
APV Approve
APV Approach with Vertical Guidence
APVL Approval
AQAFO Aeronautical Quality Assurance Field Office
AQP Advanced Qualification Program
AQR Airline Quality Report
AQS FAA Office of Quality, Integration and Executive Services
AR Atlantic Route
ARA Research and Acquisition
ARAC Area Airports Checked
ARAC Army Radar Approach Control (AAF)
ARAC Army Radar Approach Control Facility
ARAC Aviation Rulemaking Advisory Committee
ARAD Altitude Radial
ARB Air Reserve Base
ARC Administrator's Review Committee
ARC Airlines Reporting Corporation
ARC Area Chart
ARC Aviation Review Committee
ARC Aftermarket Risk Contract
ARC FAA Office of Regions and Center Operations
ARCP Air Refueling Control Point
ARCTR FAA Aeronautical Center or Academy
AREA Automated En Route Air Traffic Control
AREP Air Refueling Egress Point
AREX Air Refueling Exit
ARF Airport Reservation Function
ARFF Aircraft Rescue and Fire Fighting
ARFFOK Airport Rescue and Fire Fighting Alarm Checked
ARFOR Area Forecast
ARIA Aviation Risk Identification and Assessment
ARINC Aeronautical Radio Incorporated
ARIP Air Refueling Initial Point
ARL Aerial
ARLNO Airline Office
ARLO Army Liaison Officer
ARM FAA Office of Rulemaking
ARMET Forecast upper wind and temperature at specified points
ARML Airmail
A-RNAV Advanced Area Navigation
ARND Around
ARNG Arrange
ARNOT Area Notice
ARO Air Traffic Services Reporting Office
ARO Airport Reservation Office
ARP Aerodrome Reference Point
ARP Airport Reference Point
ARP Airport Reservation Position
ARP Air Report
ARP SAE Aerospace Recommended Practices
ARP FAA Airports Organization
ARP Office of Airports
ARP FAA Office of Airports
ARPT Airport
ARQ Automatic Error Correction Equipment
ARR Arrival or Arrive
ARS Air Rescue Service (USAF)
ARS Air Traffic Requirements Service
ARS Airport Surveillance Radar
ARS Automated Reproduction System
ARS Special Air Report
ARSA Airport Radar Service Area
ARSA Aeronautical Repair Stations Association
ARSR Air Route Surveillance Radar
ARSR Long Range Surveillance Radar
ARST Arrest
ARTC Air Route Traffic Control
ARTCC Air Route Traffic Control Center
ARTS Automated Radar Terminal System
ARU Airborne Radar Unit
ARU Airspace Reservation Unit
ARUNK Arrival Unknown
AS Altostratus
AS Aeronautical Standard
AS Airspeed
A/S Airspeed
ASA American Standards Association
ASA Autoland Status Annunciator
ASAP As Soon as Possible
ASAP Aviation Safety Action Program
ASARS Advanced Synthetic Aperture Radar System
ASAS Aviation Safety Analysis System
ASC Ascent
ASC AUTODIN Switching Center
ASC Aero Sports Connection
ASCB Avionics Standard Communications Bus
ASCII American Standard Code for Informational Exchange
ASCP Aviation System Capacity Plan
ASCR Asymmetrical Silicon Controlled Rectifier
ASCU Automatic Scanning Control Unit
ASD Aircraft Situation Display
ASD Airspace Docket
ASDA Accelerate Stop Distance Available
ASDAR Aircraft to Satellite Distance Available
ASDE Airport Surface Detection Equipment
ASDE-3 Airport Surface Detection Equipment-3
ASDE-X Airport Surface Detection Equipment-X
ASE Altimetry System Error
ASEL Airplane Single-Engine Land
ASES Airplane Single-Engine Sea
ASEF Air Saftey Foundation
ASGN Assign
ASH FAA Office of Security & Hazardous Materials
ASI Altimeter Setting Indicator
ASI Airspeed Indicator
ASI Aviation Safety Inspector
ASIAS Aviation Safety Information Analysis and Sharing
ASIP Airspace Flight Inspection Pilot
ASL Above Sea Level
ASLAR Aircraft Surge Launch and Recovery
ASM Available Seat Mile
ASM Air-to-Surface Missile
ASMD Assumed
ASN Antenna Structure Number
ASND Ascend
ASO Southern Region
ASOS Automated Surface Observing System
ASP Airport System Plan
ASP Airspace
ASP Arrival Sequencing Program
ASPH Asphalt
ASPM Aviation System Performance Metrics
ASPS Airborne Self Protection System
ASQP Airline Service Quality Performance
ASR Airport Surveillance Radar
ASR Airways Facilities Spectrum Policy and Management
ASR Alkali Silica Reactivity
ASR Antenna Structure Registration
ASR Terminal Surveillance Radar
AS/R Automatic Send/Receive
ASRAAM Advanced Short Range Air-to-Air Missile
ASRS Aviation Safety Reporting System
ASR-WSP Airport Surveillance Radar-Weather System Processor
ASSOC Associate
ASST Assistant
AST Aviation Safety Technician
AST FAA Office of Commercial Space Transportation
ASTA Airport Surface Traffic Automation
ASTM American Society for Testing and Materials
ASTOVL Advanced STOVL
ASU Altitude Sensing Unit
ASV Airline Schedule Vendor
ASW Southwest Region
ASW Anti Submarine Warfare
ASYM Asymmetrical
ASYNC Asynchronous Concentrator
AT Air Traffic
AT Auto Throttle
AT&T American Telephone and Telegraph
AT&T ASDC AT&T Agency Service Delivery Center
AT&T CSA AT&T Customer Support Associate
ATA Actual Time of Arrival
ATA Air Transport Association of America
ATA Airline Transport Association
ATA Aviation Training Association
ATAM At and Maintain
ATAR Above Transmitted as Received Air Traffic Control
ATAS Airspace and Traffic Advisory Service
ATC Air Traffic Control
ATC After Top Center
ATC Approved Type Certificate
ATCA Air Traffic Control Association
ATCA Air Traffic Control Advises
ATCAA Air Traffic Control Assigned Airspace
ATCAA Air Traffic Control Assigned Airspace
ATCBI Air Traffic Control Beacon Interrogator
ATCBI Maintenance of Air Traffic Control Beacon Indicator
ATCC Air Traffic Control Clears
ATCCC Air Traffic Control Command Center
ATCF Air Traffic Control Facility
ATCH Attach
ATCO Air Taxi Commercial Operator
ATCOR Air Traffic Control Operations Representative
ATCOTS Air Traffic Control Optimum Training Solutions
ATCR Air Traffic Control Requests
ATCRB Air Traffic Control Radar Beacon
ATCRBS Air Traffic Control Radar Beacon System
ATCS Air Traffic Control Specialist
ATCSCC Air Traffic Control Systems Command Center
ATCT Airport Traffic Control Tower
ATCT Air Traffic Control Transponder
ATC-TFM Air Traffic Control Traffic Flow Management
ATD Actual Time of Departure
ATD Along Track Distance
ATE Actual Time Enroute
ATE Automatic Test Equipment
ATEC Aviation Technician Education Council
ATF Aerodynamic Twisting Force
ATFC Account Traffic
ATFM Air Traffic Flow Management
ATIDS Airport Surface Target Identification System
ATIRCM Advanced Threat Infrared Countermeasures
ATIS Automatic Terminal Information Service
ATISR Automated Terminal Information System Recorder
ATLAS Abbreviated Test Language for Avionics Systems
ATLC Atlantic
ATM Air Traffic Management
ATM Air Traffic Manager
ATM Asynchronous Transfer Mode
ATM Authentication Maneuver
ATM Aerodynamic Twisting Moment
ATMAC Air Traffic Management Advisory Committee
ATMS Advanced Traffic Management System
ATMS Automated Training Management System
ATMT Attempt
ATMTC Attempt to Contact
ATN Aeronautical Telecommunications Network
ATND Attend
ATO Aeronautical Telecommunications Operator
ATO Air Traffic Organization
ATODN AUTODIN Terminal (FUS)
ATOG Allowable Take off Gross Weight
ATOL Automatic Test-Oriented Language
ATOMS Air Traffic Operations Management System
ATOP Advanced Technologies and Oceanic Procedures
ATOS Air Transportation Oversight System
ATOVN AUOTVON (Facility)
ATP Actual Time of Penetration
ATP Air Traffic Procedures
ATP Advanced Turboprop
ATP Airline Transport Pilot
ATPAC Air Traffic Procedures Advisory Committee
ATPC Airline Transport Pilot Certificate
ATP CTP Airline Transport Pilot Certification Training Program
ATPE Airline Transport Pilot Examiner
ATPL Airline Transport Pilot License
ATR Air Traffic Requirements
ATR Air Transport Rating
ATR Avions de Transport Regional
ATREP Air Traffic Representative
ATRLS Actual Time of Release
ATS Air Traffic Service
ATS Automated Throttle System
ATSAP Air Traffic Safety Action Program
AT/SC Autothrottle/Speed Control
ATSCCP Air Traffic Service Contingency Command Post
ATSCCP ATS Contingency Command Post
ATSP Air Traffic Service Provider
ATSS Airway Transportation Systems Specialist
ATT American Telephone and Telegraph Company
ATT Attitude
ATTIS AT&T Information Systems
ATTM At This Time
ATTN Attention
ATU Antenna Turning Unit
AT-VASIS Abbreviated T Visual Approach Slope Indicator System
ATZ Aerodrome Traffic Zone
AUG Augmentation
AUGRA Authority Granted
AUNICOM Automated Aeronautical Advisory Station
AURBO Aurora Borealis
AUREQ Authority Requested
AUS Aeronautical Update Service
AUTH Authority
AUTH Authorized
AUTO Automatic
AUTOB Automatic Weather Reporting System
AUTODIN DoD Automatic Digital Network
AUTOVON DoD Automatic Voice Network
AUW All Up Weight (Gross Weight)
AUX Auxiliary
AUZ Authorize
AVANA Altitude Reservation Void for Aircraft Not Airborne By
AVBL Available
AVC Automatic Volume Control
AVFP Activate VFR Flight Plan
AVFPNO Pilot Failed to Activate VFR/DVFR Flight Plan
AVG Average
AVGAS Aviation Gasoline
AVM Airborne Vibration Monitor
AVN Aviation
AVN Aviation Standards National Field Office, Oklahoma City
AVN Aviation System Standards
AVON AUTOVON Service
AVS FAA Office of Aviation Safety
AVSI Aerospace Vehicle Systems Institute
AVT Advanced Vectored Thrust
AWA Advise When Able
AWA Aviation/Space Writers Association
AWACS Airborne Warning and Control System
AWANS Aviation Weather and NOTAM System
AWBE Automatic Weather Broadcast Equipment
AWC Aviation Weather Center
AWE Advise When Established
AWG American Wire Gage
AWIPS Advanced Weather Interactive Processing System
AWIS Airport Weather Information
AWL All Weather Landing
AWOS Automated Weather Observing System
AWP Aviation Weather Processor
AWP Western Pacific Region
AWPG Aviation Weather Products Generator
AWR Airborne Weather Radar
AWRP Aviation Weather Research Program
AWS Air Weather Service
AWS Air Weather Station
AWSS Automated Weather Sensors System
AWT Await or Awaiting
AWTT Aviation Weather Technology Transfer
AWW Airport Weather Warnings
AWW Severe Weather Forecast Alert
AWX Account Weather
AWY Airway
AXPS Air Express
AXX One of the 9 Regional Offices
AZM Azimuth
AZRAN Azimuth and Range Data
B
B Base leg
B Beginning of precipitation (time in minutes) (weather reports only)
B Bering Standard Time (time groups only)
B Blue
B Center Clearance Delivered
B/B Back Beam
B/C Back Course
B/D Bottom of Descent
BA Bank Angle
BA Braking Action
BA British Airways
BA Budget Analyst
BAA Bilateral Airworthiness Agreement
BAC Below All Clouds
BACLIN Baroclinic or Baroclinic Prognosis
BAD Budget Analysis Database
BAE British Aerospace
BAFVC Bids Accepted for the Following Vacancies
BAL Balance
BANS BRITE Alphanumeric System
BARO Barometric
BARO-VNAV Barometric Vertical Navigation
BART Billing Analysis Reporting Tool (GSA software tool)
BASA Bilateral Aviation Saftey Agreement
BASE Cloud Base
BASIC Basic Contract Observing Station
BASOP Military Base Operations
BASOPS Base Operations Office
BATD Basic Aviation Training Device
BATROP Barotropic or Barotropic Prognosis
BATT Battery
BB Bar Bias
BBC Before Bottom Center
BBD Bucket Brigade Device
BC Back course
BC Beginning climb
BC British Columbia
BC Patchy
BCA Benefit/Cost Analysis
BCD Binary Coded Decimal
BCFG Patchy Fog
BCH Beach
BCKG Backing
BCM Back Course Marker
BCM Become
BCMG Becoming
BCMS Becomes
BCN Beacon
BCR Benefit/Cost Ratio
BCREQ Broadcast Requested
BCSL Base Current Switch Logic
BCST Broadcast
BCSTN Broadcast station
BD Bottom of Descent
BDA Bermuda
BDAT Beacon Data (digitized)
BDAT Digitized Beacon Data
BDR Border
BDRY Boundary
BDSLD Bids Solicited
BEAMOS Beam Addressed Metal Oxide Silicon Semiconductor
BECMG Becoming (Expected between 2 digit beginning hour and 2 digit ending hour)
BERMS Beacon Environmental Remote Monitoring Subsystem
BFDK Before Dark
BFET Bipolar Field Effect Transistor
BFL Buffered Field Effect Transistor Logic
BFO Backfill Overtime
BFO Beat Frequency Oscillator
BFO Blazing Flash of the Obvious (DOD)
BFR Before
BFR Biennial Flight Review
BGI Basic Ground Instructor
BGN Began or Begin
BGND Begin Descent
BGND Beginning Descent
BGNG Beginning
BGNS Begins
BHND Behind
BHP Brake Horsepower
BIFR Before Encountering IFR Conditions
BIGFET Bipolar Insulated Gate Field Effect Transistor
BIM Building Information Modeling
BIMOS Bipoloar Metal Oxide Silicon Semiconductor
BINOVC Breaks in Overcast
BIP Backup Interface Processor
BIRDTAM Bird Notices to Airmen
BIT Binary Digit
BITE Built-In Test Equipment
BKN Broken
BL Blowing
BLC Boundry Layer Control
BLD Build
BLDG Building
BLDS Builds
BLDU Blowing Dust
BLDUP Buildup
BLKHLS Black Hills
BLKT Blanket
BLKTG Blanketing
BLKTS Blankets
BLN Balloon
BLO Below
BLO Below Clouds
BLSA Blowing Sand
BLSN Blowing Snow
BLW Below
BLX Block
BLZD Blizzard
BM Back Marker
BMBR Bomber
BMEP Brake Mean Effective Pressure
BML Bipolar Memory, Linear
BMP Best Management Practices
BMS Basic Meteorological Services
BN Blowing sand
BND Bound
BNDRY Boundary
BNDRYS Boundaries
BNR Binary Numerical Reference
BNTH Beneath
BOC Bell Operating Company
BOD Beneficial Occupancy Date
BOMB Bombing
BOP Bipolar Operational Power
BORAM Block Oriented Random Access Memory
BOVC Base of Overcast
BOW Basic Operating Weight
BPB Business Plan Builder
BPCU Bus Power Control Unit
BPOC Before Proceeding on Course
BPR Bypass Ratio
BPS Bits Per Second
BPS Bytes Per Second
BPT Beginning Procedure Turn
BR Bahama Route
BR BMW-Rolls-Royce
BR Branch
BR Mist
BRAF Braking Action Fair
BRAG Braking Action Good
BRAN Braking Action Nil
BRAP Braking Action Poor
BRF Brief
BRG Bearing
BRGT Bright
BRI Basic Rate Interface
BRITE Bright Radar Indicator Terminal Equipment
BRK Break
BRKG Braking
BRKHIC Breaks in Higher Overcast
BRKS Breaks
BRKSHR Berkshire
BRL Building Restriction Line
BRM Barometer
BRS Branches
BS Commercial Broadcasting Station
BSAF Bids Solicited as Follows
BSC Bird Sweep Completed
BSFC Brake Specific Fuel Consumption
BSHP Beginning Standard Holding Procedure
BSIAP Beginning Straight in Approach
BSR Bit Shift Register
BSRAP Beginning Standard Range Approach
BSRO Begin Standard Refuel Orbit
BSS Baseline Synchronization Service
BT Back Taxiing
BTB Bus Tie Breaker
BTC Before Top Center
BTL Between Layers
BTN Between
BTR Better
BTU British Thermal Unit
BTWN Between
BU Buffer Unit
BUEC Back-up Emergency Communications
BUECE Back-up Emergency Communications Equipment
BUIC Backup Interceptor Control
BUL Bulletin
BUR Bureau
BUS Business
BY Blowing Spray (Weather reports only)
BYD Beyond
BZR Buzzer (radar)
