D
- danger area
- dangerous articles
- dangerous goods
- dangerous goods accident
- dangerous goods incident
- dangerous items
- dangerous materials
- data recorder
- datum
- de-icing equipment
- de-icing/anti-icing facility
- de-icing/anti-icing pad
- dead center position
- dead engine
- dead man’s curve
- dead reckoning
- dead weight
- deadman’s curve
- debriefing
- decalage
- deceleration
- decision altitude
- decision height
- decision speed
- declared capacity
- declared distances
- decompression illness (DCI)
- decompression sickness
- deflecting force
- deicer
- deicing
- delamination
- delay
- delta
- delta hinge
- delta wing
- demand
- demand and capacity balancing
- demonstration flight
- densely populated area
- density altitude
- Department of Airspace Control
- departure
- departure procedure
- departure time
- dependent parallel approaches
- depression
- depressurization
- descent
- descent angle
- descent rate
- designated postal operator
- destination sign
- detect and avoid
- deviation
- deviation of the wind
- dew point
- diaphragm
- dielectric heating
- difference in depth of modulation
- differential ailerons
- differential pressure
- diffuser
- dihedral
- dilatable balloon
- direct-injection pump
- direct flight
- direct flying cost
- direct reaction engine
- direct route
- direct transit area
- direction sign
- directional control
- directional gyro
- directional shear
- directional stability
- dirigible
- disabled aircraft
- disabled person
- dischargeable weight
- discontinuity
- disembarkation
- dispatcher
- dispersal
- dispersion
- displaced runway threshold
- displaced threshold
- disruptive passenger
- dissipation
- dissipation trail
- dissymmetry of rotor thrust
- distance measuring equipment
- distância de aceleração-parada exigida
- distress
- distress call
- distress frequency
- distress message
- distress phase
- distress traffic
- distressed aircraft
- disymmetry of lift
- ditching
- dive
- dive flap
- diversion
- dolly
- domestic flight
- dope
- double-engine power unit
- double-entry centrifugal compressor
- double-entry compressor
- double-tapered wing
- double taper
- downburst
- downdraft
- downdraught
- downwash
- downwind leg
- drag
- drag brace
- drag chute
- drag rope
- drain valve
- drift
- drift-down
- drift angle
- drift correction
- drift correction angle
- drift down
- driftdown
- drizzle
- drogue parachute
- drone
- drop tank
- dry-adiabatic lapse rate
- dry-adiabatic process
- dry air
- dry contact
- dry runway
- dry snow
- dry weight
- dual-pilot operation
- dual flight instruction
- dual instruction
- dual rotor
- duplex burner
- duplicatus
- dust
- duststorm
- dutch roll
- dynamic balance
- dynamic balancing
- dynamic hydroplaning
- dynamic risk assessment
- dynamic stability
- dynamotor
- dysbarism