A/P    Autopilot
ADF   Automatic Direction Finder
AFIS   Airborne Flight Info System
Air   Air Conditioning
CHT   Cylinder Head Temperature Gauge
Com   Communications Radio
DME   Distance Measuring Equipment
EFIS   Electronic Flight Information System
EGT   Exhaust Gas Temperature Gauge
Enc   Altitude Encoder
F/D   Flight Director
FADEC   Full Authority Digital Engine Control
FMS   Flight Managment System
G/S   Glideslope
GPS   Global Positioning System
GPWS   Ground Proximity Warning System
HF   High Frequency Transceiver
HSI   Horizontal Situation Indicator
HUD   Head Up Display
IFR   Instrument Flight Rules
ILS   Instrument Landing System
Ice   Has Anti-Icing Equipment
Known Ice   Certified to Fly in Known Icing Conditions
LR Fuel   Long Range Fuel
Loc   Localizer
Lrn   Loran
MLS   Microwave Landing System
N/C   Navigation and Communication Radios
Nav   Navigation Radio
NavCom   Navigation and Communication Radios
OC   On Condition
Omega   VLF (Very Low Frequency) Navigation
Pants   Fixed Gear Wheel Covers
RDR   Radar
RMI   Radio Magnetic Indicator
Ralt   Radar Altimeter
Rnav   Area Navigation (Usually Includes DME)
Rstol   Robertson Stol Kit
SFRM   (Time) Since Factory Remanufacture
SHS   (Time) Since Hot Section Inspection (Turbines)
SMOH   (Time) Since Major Overhaul
SPOH   (Time) Since Prop Overhaul
STOH   (Time) Since Top Overhaul (Piston Engines)
Slc   Slaved Compass
Stol   Short Takeoff and Landing Equipment
Storm   Stormscope (Lightning Detector)
T'XD   Time Expired - Overhaul Required
TBO   Time Between Overhauls
TCAD   Traffic/Collision Avoidance Device
TCAS   Traffic Alert and Collision Avoidance System
TT   Total Time
TTSN   Total Time Since New
Trev   Thrust Reversers
VNAV   Vertical Navigation computer
VOR   Very High Frequency Omnidirectional Range (Nav Radio)
VSI   Vertical Speed Indicator
Xpdr   Transponder