A
- abbreviated precision approach path indicator
- abbreviated T visual approach slope indicator system
- abnormal procedure
- abnormal situation
- above ground level
- above mean sea level
- absolute
- absolute altitude
- absolute ceiling
- accelerate-stop distance
- accelerate-stop distance available
- accelerate-stop distance required
- accelerated stall
- acceleration
- acceleration error
- acceleration pump
- accelerometer
- acceptable level of safety performance
- acceptable means of compliance
- accepting controller
- accepting unit
- access road
- accessory gearbox
- accident
- acclimatization
- accountable document
- accredited medical conclusion
- accumulated temperature
- accumulation
- accuracy
- acknowledgement
- aclinic line
- acrobatic flight
- across track error
- active repair time
- active runway
- active satellite
- acts of unlawful interference
- actual time of arrival
- actual time of departure
- actual time of observation
- adequate alternate aerodrome
- adiabat
- adiabatic lapse rate
- adiabatic process
- adjustable pitch propeller
- admission
- ADS agreement
- adult
- advance boundary information
- advanced passenger information
- advanced surface movement guidance and control system
- advection
- advective thunderstorm
- advise
- advise at what time able
- advisory airspace
- advisory route
- aerial photography
- aerial refueling
- aerial survey
- aerial work
- aero-engine
- aerobatics
- aerodrome
- aerodrome beacon
- aerodrome certificate
- aerodrome climatological summary
- aerodrome climatological table
- aerodrome control
- aerodrome control service
- aerodrome control tower
- aerodrome elevation
- aerodrome emergency plan
- aerodrome field length
- aerodrome flight information service
- aerodrome ground movement chart
- aerodrome identification sign
- aerodrome mapping data
- aerodrome meteorological office
- aerodrome operating minima
- aerodrome operator
- aerodrome reference point
- aerodrome special meteorological report
- aerodrome traffic
- aerodrome traffic circuit
- aerodrome traffic density
- aerodrome traffic zone
- aerodromes, air routes and ground aids
- aerodynamic balance
- aerodynamic center
- aerodynamic damping
- aerodynamic forces
- aerodynamic heating
- aerodynamic lift
- aerodynamics
- aerodyne
- aerofoil
- aerological diagram
- aeronautical beacon
- aeronautical chart
- aeronautical data
- aeronautical fixed service
- aeronautical fixed station
- aeronautical fixed telecommunications network
- aeronautical ground light
- aeronautical information
- aeronautical information circular
- aeronautical information manual
- aeronautical information publication
- aeronautical information regulation and control
- aeronautical information service
- aeronautical meteorological service
- aeronautical meteorological station
- aeronautical mobile satellite service
- aeronautical mobile service
- aeronautical radionavigation service
- aeronautical station
- aeronautical telecommunication service
- aeronautical telecommunication station
- aeronautical telecommunications network
- aerophobia
- aeroplane reference field lenght
- aeroplane reference field length
- aeroplane system
- aerostat
- after passing
- afterburner
- aging aircraft
- agricultural aviation
- agricultural operations
- aileron
- aiming point marking
- AIP amendment
- AIP Supplement
- air-ground communication
- air-ground control radio station
- air-report
- air-taxiing
- air-to-air
- air-to-air missile
- air-to-ground
- air-to-ground communication
- air base
- air cargo
- air cargo terminal
- air carrier capacity
- air cushion vehicle
- air data computer
- air defence
- air defense identification zone
- air mass
- air mass thunderstorm
- air navigation
- air navigation facility
- air navigation service provider
- air navigation services
- air operator certificate
- air taxi
- air temperature
- air ticket
- air traffic
- air traffic advisory service
- air traffic control
- air traffic control clearance
- air traffic control instruction
- air traffic control service
- air traffic control surveillance minimum altitude chart
- air traffic control tower
- air traffic control unit
- air traffic controller
- air traffic flow
- air traffic flow management
- air traffic management
- air traffic management system
- air traffic safety electronics personnel
- air traffic service
- air traffic services airspaces
- air traffic services interfacility data communications
- air traffic services reporting office
- air traffic services unit
- air transit route
- airborne
- airborne collision avoidance system
- airborne early warning
- airborne situational awareness
- airborne weather radar
- aircraft
- aircraft-category
- aircraft - category
- aircraft — type of
- aircraft accident
- aircraft address
- aircraft approach category
- aircraft autonomous integrity monitoring
- aircraft avionics
- aircraft call sign
- aircraft carrier
- aircraft certificated for single-pilot operation
- aircraft classification number
- aircraft communications addressing and reporting system
- aircraft configuration
- aircraft earth station
- aircraft equipment
- aircraft fueling
- aircraft interchange
- aircraft maintenance manual
- aircraft maintenance mechanic
- aircraft make
- aircraft model
- aircraft movement
- aircraft nationality mark
- aircraft nose
- aircraft observation
- aircraft on ground
- aircraft operator manual
- aircraft operators’ documents
- aircraft owners and pilots association
- aircraft proximity
- aircraft recovery
- aircraft registration
- aircraft registration mark
- aircraft required to be operated with a co-pilot
- aircraft security check
- aircraft security search
- aircraft stand
- aircraft stand manoeuvring guidance lights
- aircraft stand taxilane
- aircraft wreckage
- aire de retrait des bagages
- airfare
- airframe
- airline
- airline alliance
- airline and operators’ documents
- airline pilot
- airman
- airman's meteorological information
- airmanship
- airmass shower
- airplane
- airplane configuration
- airplane flight manual
- airport
- airport capacity
- airport handling manual
- airport infrastructure
- airport level
- airport operator
- airport slot
- Airports Council International
- airship
- airshow
- airsickness
- airside
- airspace
- airspace control
- airspeed
- airspeed indicator
- airway
- airworthiness
- airworthiness certificate
- airworthiness directive
- AIS product
- albedo
- albedograph
- albedometer
- alert phase
- alerting post
- alerting service
- alfa
- all-cargo aircraft
- all-up weight
- alphanumeric characters
- alternate aerodrome
- alternate airport
- alternate heliport
- alternate routing unknown
- altimeter
- altimeter check location
- altimeter setting
- altimetry system error
- altitude
- altocumulus
- altostratus
- ambient temperature
- amended meteorological message
- ampere
- amphibian helicopter
- amphibians
- anaphylaxis
- antenna
- anti-ice
- anticipated operating conditions
- anticollision light
- anticyclone
- approach
- approach and landing operations using instrument approach procedures
- approach and landing operations with vertical guidance
- approach and landing phase - helicopters
- approach angle
- approach area
- approach control
- approach funnel
- approach light system
- approach procedure with vertical guidance
- approach reference noise measurement point
- approach sequence
- approach speed
- approach surface
- appropriate airworthiness requirements
- approved
- approved maintenance organization
- approved training
- approved training organization
- apron
- apron management service
- apron taxiway
- aquaplaning
- area control centre
- area control service
- area minimum altitude
- area navigation
- arresting system
- arrival
- ASHTAM
- aspect ratio
- assemble
- assigned altitude deviation
- assignment
- asymmetric flight
- atmosphere
- attack helicopter
- attitude and heading system reference
- attitude indicator
- augmentation system
- authorized agent
- auto-coupled approach
- automated data interchange system
- automated external defibrillator
- automatic dependent surveillance
- automatic dependent surveillance unit
- automatic deployable ELT
- automatic direction finder
- automatic fixed ELT
- automatic landing
- automatic portable ELT
- automatic terminal information system
- automation management
- autonomous aircraft
- autonomous runway incursion warning system
- autopilot
- autothrottle
- auxiliary power unit
- available
- available seat-kilometres
- aviation maintenance technician
- aviation routine weather report
- aviation service providers
- aviation weather observation
- avionics
- azimuth guidance unit