Boots
Inflatable device used to remove ice of wings and tail.
C/R
Counter Rotating propellers
CAMP
Computerized Aircraft Maintenance Program.
CDI
Course Deviation Indicator.
CEP
Circular Error Probable.
CHT
Cylinder Head Temperature.
Com
Communications (commonly used to indicate on-board radio equipment)
Comm
Commissioning Date
Conventional Gear
Two main wheels with one tail wheel. Also referred to as a "Taildragger"
CT
Carburetor Temperature
Cycles
Turbine engine cycle [start up - continues w. full-power - ends with shutdown]
De-ice
Complete de-ice equipment
DEU
Defective Unit
DF
Direction Finder
DFDR
Digital Flight Data Recorder
DG
Directional Gyro
DME
Distance Measuring Equipment
EFIS
Electronic Flight Instrument System
EGT
Exhaust Gas Temperature
ELT
Emergency Locator Transmitter
ENC
Encoder
F/D
Flight Director
FAA
Federal Aviation Administration
FGP
Full Gyro Panel
FOC
Full Operating Capability
Full De-Ice
Complete de-ice/anti-ice equipment installed on wings, tail, props, and windshield
Full Panel
All gyros necessary for instrument flight
FWF
Firewall Forward
Sometimes referencing reg overhaul.
TBO
Time Between Overhaul
TTAF
Total Time Airframe