D
- dangerous articles
- dangerous goods
- dangerous goods accident
- dangerous goods incident
- dangerous items
- dangerous materials
- datum
- de-icing/anti-icing facility
- de-icing/anti-icing pad
- dead man's curve
- dead man anchor
- 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
- defuel valve
- deicer
- deicing
- delay
- delta hinge bolt
- delta wing
- demand
- densely populated area
- density altitude
- Department of Airspace Control
- departure
- departure procedure
- departure time
- departures
- dependent parallel approaches
- depression
- depressurization
- descent
- descent angle
- descent rate
- designated postal operator
- destination sign
- deviation
- difference in depth of modulation
- digital flight control system
- dihedral
- direct reaction engine
- direct transit area
- direction sign
- direction signintersection
- directional control
- directional gyro
- directional stability
- dirigible
- disable aircraft
- disabled person
- disc loading
- discontinuity
- disembarkation
- dispatch deviation procedures guide
- dispatcher
- dispersal
- dispersion
- displaced runway threshold
- displaced threshold
- disruptive passengers
- dissipation
- dissipation trail
- dissymmetry of rotor thrust
- distance measuring equipment
- distress
- distress call
- distress frequency
- distress message
- distress phase
- distress traffic
- distressed aircraft
- ditching
- dive
- dive angle
- diversion
- domestic flight
- dope
- downburst
- downdraft
- downdraught
- downwind leg
- drag
- drag coefficient
- drift
- drift-down
- drift angle
- drift correction
- drift correction angle
- drift down
- driftdown
- drizzle
- drogue-refuelling
- drogue parachute
- drone
- dry-adiabatic process
- dry operating index
- dry runway
- dry snow
- dry weight
- dual-pilot operation
- dual flight
- dual flight instruction
- dual instruction
- duplicatus
- duststorm
- dutch roll
- dynamic hydroplaning
- dynamic stability
- dysbarism