Constraint CSU
Command Sensor Unit CT
Current Transformer CTL
Central CTL
Control CTR
Center CU
Control Unit
CUDU
Current Unbalance Detection Unit
CUR
Current
CVR
Cockpit Voice Recorder CVT
Center Vent Tube CW
Clockwise
D/D
Engine Out Drift Down Point D/O
Description and Operation DA
Drift Angle
DAC
Digital to Analog Converter
DAR
Digital ACMS Recorder DC
Direct Current
DDRMI
Digital Distance and Radio Magnetic Indicator DEC
Declination
DECEL
Decelerate
DECR
Decrease DEF
Definition
DELTA P
Differential Pressure DES
Descent
DEST
Destination DET
Detection, Detector
DEU
Decoder/Encoder Unit
DEV
Deviation
DFDR
Digital Flight Data Recorder
DFDRS
Digital Flight Data Recording System DGI
Digital Input
DGO
Digital Output DH
Decision Height DIA
Diameter
DIFF
Differential DIM
Dimming, Dimension DIR
Direction, Direct, Director
DISC
Disconnect, Disconnected
DIST
Distance
DMA
Direct Memory Access
DMC
Display Management Computer
DME
Distance Measuring Equipment
DMU
Data Management Unit DN
Down
DNLK
Downlock
DPDT
Double Pole/Double Throw DPI
Differential Pressure Indicator DR
Dead Reckoning
DRVR
Driver
DSCRT
Discrete
DSDL
Dedicated Serial Data Link DSI
Discrete Input DSO
Discrete Output
DSPL
Display
DTG
Distance to Go
DTMF
Dual Tone Multiple Frequency DU
Display Unit