A
A/C Air Conditioning
A/G Air/Ground
A/ICE Anti-ice
A/P Autopilot
A/S Airspeed
A/SKID Anti-skid
ABS Absolute
AC Alternating Current
ACARS ARINC Communications Addressing and Reporting
System
ACCEL Acceleration, accelerate(d), accelerometers
ACM Air Cycle Machine
ACMP Alternating Current Motor Pump/Electric Hydraulic
Pump
ACPC Alternating Current Power Center
ACSC Air Conditioning System Controller
ACT Active
ACU Air Conditioning Unit
ACV Air Control Valve
ADC Air Data Computer
ADDR Address
ADF Automatic Direction Finder
ADI Attitude Director Indicator ADS Air Data System
AFCS Automatic Flight Control System
AFT Aftward
AGL Above Ground Level
AHC Attitude Heading Computer
AIL Aileron
ALIGN Aligning, alignment
ALPHA alpha
ALT Altitude, Altimeter
ALT Altitude Hold (PFD/FD)
ALT CAP Altitude Capture (PFD/FD) ALT HOLD Altitude Hold
ALTN Alternate
ALTS Selected Altitude Arm/Abort (PFD/FD)
AM Amplitude Modulation
AMB Ambient
AMP Amperes
ANNUN Annunciator
ANT Antenna
AOA Angle of Attack
AP Autopilot
APP, APR Approach
APPROX Approximately
APU Auxiliary Power Unit
ARINC Aeronautical Radio Incorporated
ARP Air Data Reference Panel ASCB Avionic Standard Communication Bus
ASYM Asymmetrical
AT Auto Throttle
ATA Air Transport Association ATC Air Traffic Control
ATS Air Turbine Starter
ATT Attitude
ATTD Attitude
ATTND Attendant
AUTO Automatic
AUTO BAL Automatic Balance
AUTO XFER Automatic Transfer
AUX Auxiliary
AV Avionics
AVAIL Available
AZ Azimuth
B
B/AIR Bleed Air
B/C, BC Back Course
B/CRS Back Course
BCU Brake Control Unit
B/LEAK Bleed Leak
BARO Barometric
BAT Battery
BATT Battery
BDI Bearing Distance Indicator BIT Built-In-Test
BITE Built-In-Test Equipment
BLD Bleed
BMC Bleed Management
Controller
BOOM Headset microphone
BRG Bearing
BRK Brake
BRKR(s) Breaker(s)
BRT Bright
BTL Bottle
BTMS Brake Temperature
Monitoring System
BTMU Brake Temperature
Monitoring Unit
BYPS Bypass
C
C Center, Caution, Cabin
CAA Civil Aviation Authority (UK)
CAIMS Central Aircraft Information Maintenance System
CAL Calibrate
CAP Capture
CAPT Captain
CAS Calibrated Air Speed, Crew Alerting System
CAT Category
CAT II Category II
CB, C/B Circuit Breaker
CBP Circuit Breaker Panel
CCBP Cockpit Circuit Breaker Panel CCW Counter Clockwise
CDL Configuration Deviation List CDP Compressor Discharge
Pressure
CDU Control Display Unit
CFM Cubic Feet Per Minute
CG Center of Gravity
CH Chapter, Channel
CHAN Channel
CHG Change
CHGR Charger
CHRT Chart
CK Check
CKPT Cockpit
CKT Circuit
CL Centerline
CL Closed
CLB Climb
CLK Clock
cm Centimeters
CMD Command
CMPS Compass
CMPTR Computer
CO2 Carbon Dioxide
COM Communication
COMM Communication
COMP Compressor, Comparator COMPT Compartment
COND Condition, Continued
CONFIG Configuration
CONN Connection
CONT Control, Continuous, Contactor, Controller
CORR Correction
CPAM Cabin Pressure Acquisition Module
CPCP Cabin Pressure Control
Panel
CPC Cabin Pressure Controller CPCS Cabin Pressure Control
CPL Couple
CPLT Copilot
CRS Course
CRT Cathode Ray Tube
CRZ Cruise
CTR Center
CTRL Control
CVR Cockpit Voice Recorder
CW Clockwise
CYL Cylinder
D
DA Drift Angle
DAU Data Acquisition Unit
DBU Data Base Unit
DC Direct Current
DCP Display Control Panel
DCPC Direct Current Power Center
DCT Direct
DECEL Decelerate(d)
DECR Decrease
DEFL Defuel
DEG Degree
DEGRAD Degraded
DEPR Depressurize
DEPT Departure
DEST Destination
DET Detector
DEV Deviation
DFDAU Digital Flight Data Acquisition Unit
DFDR Digital Flight Data Recorder
DG Directional Gyro
DH Decision Height
DIFF Differential
DIM Dimming
DIR Direct
DIS Distance (to way point), Disconnect
DISC Disconnect
DISCH Discharge
DISP Dispatch, Display
DIST Distance
DME Distance Measuring
Equipment
DN Down
DOT Department of Transport (Canada)
DR Door
DSPY Display
E
EAS Equivalent Airspeed
ECP EICAS Control Panel
ECS Environmental Control
ECU Electronic Control Unit
ED EICAS Display
EEC Engine Electronic Controller EDP Engine Driven Pump/Engine Primary Hydraulic Pump
EFIS Electronic Flight Instrument System
EGPWS Enhanced Ground Proximity Warning System (including windshear)
EGT Exhaust Gas Temperature
EICAS Engine Indication and Crew Alerting System
EL Elevation
ELEC Electrical
ELEV Elevator, Elevation
ELT Emergency Locator
Transmitter
EMER(G) Emergency
EMS Electrical Management
System
EMS CDU Electrical Management System Control Display Unit
ENG Engine
EPC External Power Contactor EPCU External Power Control Unit EPLC External Power Line
Contactor
EPGDS External Power Generation and Distribution System
EPR Engine Pressure Ratio
EQUIP Equipment
ERP Eye Reference Position (datum)
ESS Essential
ET Elapsed Time
ETA Estimated Time of Arrival ETOPS Extended Range Twin
Engine Operation
ETTC Essential TRU Tie Contactor EVAC Evacuation
EVMS Engine Vibration Monitor System
EVMU Engine Vibration Monitor Unit EWH Eye?to?wheel height
EXH Exhaust
EXT PWR External Power
EXTIN Extinguish(ed)
F
F/CTL Flight Controls
FAA Federal Aviation Administration (USA)
Electronic Control
FAIL Failure
FCC Flight Control Computer
FCU Flight Control Unit
FD, F/D Flight Director
FDAU Flight Data Acquisition Unit FDR Flight Data Recorder
FECU Flap Electronic Control Unit FEED Feeder
FF, F/F Fuel Flow
FIDEEX Fire Detection and Extinguishing System
FIRE BTL Fire Bottle
FIREX Fire Extinguisher
FL Flight Level
FL CH, FLC Flight Level Change FLD Field
FLT Flight
FLT DIR Flight Director
FLUOR Fluorescent
FM Fan Marker
FMQGS Fuel Management Quantity Gauging System
FMS Flight Management System
FPM Feet Per Minute
FPV Flight Path Vector
FQMC Fuel Quantity Management Computer
FREQ Frequency
FRTT Fuel Return To Tank
FT Feet, Foot
FW Fire Wall
FWC Fault Warning Computer
FWD Forward
G
G Gravity
G (+/?) Receiver Gain
G/S Glideslope
GA Go-around
GAL Gallon
GALY Galley
GCS Ground Clutter Suppression GCU Generator Control Unit
GE General Electric
GEN Generator
GLC Generator Line Contactor
GLD Ground Lift Dumper (ing) GMT Greenwich Mean Time
GND Ground
GNSSU Global Navigation System Sensor Unit
GP Guidance Panel
GPS Global Positioning System GPWS Ground Proximity Warning System
GR Gear
GS,G/S Glideslope
GS Ground Speed
GTC Generator Transfer
Contactor
GUIDE Guidance
GW Gross Weight
H
HBMU Heater Current/Brake Temp Monitor Unit
HDG Heading
HDG HOLD Heading Hold
HDG SEL Heading Select
HEAT Heater
HF High Frequency (3 ? 30
MHz)
Hg Mercury
HI High
HLDR Holder
HOR, HORIZ Horizontal
HOT Hot Oil Temperature
HP High Pressure
HPA Hecto Pascals
HPSOV High Pressure Shut-off Valve HSI Horizontal Situation Indicator HSTA Horizontal Stabilizer Trim Actuator
HSTCU Horizontal Stabilizer Trim Control Unit
HTR Heater
HUD Heads-up Display
HYD Hydraulic
Hz Hertz
I
I/B Inboard
I/C Intercom, Inspection Check
I/O Input/Output
IAC Integrated Avionics
Computer
IAPS Integrated Avionics Processor System
IAS Indicated Air Speed
ICAO International Civil Aviation Organization
ICS Idle Corrected Speed,
Inter-Communication System
ID Identification
IDENT Identification
IFR Instrument Flight Rules
IGN Ignition
IGV Inlet Guide Vanes
ILS Instrument Landing System
IM ILS Inner Marker
IMBAL Imbalance
IMC Instrument Meteorological Conditions
IMP Imperial
IN Inch, Inches
IN Hg Inches of Mercury
INBD Inboard
INCR Increase
IND Indication, Indicator
INFLT In Flight
INHIB, INHB Inhibit
INOP Inoperative
INPH Interphone
INSP Inspection
INST(S) Instrument(s)
INST, INSTR Instrument
INT Internal, Integral, Intersection INTEG Integral
IOP Input/Output Processor
IRS Inertial Reference System
IRU Inertial Reference Unit
ISA International Standard Atmosphere
ISO International Standard Organization
ISOL Isolation, Isolated
ITT Inter Turbine Temperature
J
JAA Joint Airworthiness Authority
K
K, KT, KTS Knots
kg(s) Kilogram(s)
kHz KiloHertz
KIAS Knots Indicated Airspeed
kW(s) KiloWatt(s)
L
L Left, Landing
L/T Landing/Taxi
LAV Lavatory
LB(s) Pound(s)
LCN Load Classification Number
LCV Load Control Valve
LDG Landing
LDG GR Landing Gear
LDU Lamp Driver Unit
LE Leading Edge
LFE Landing Field Elevation
LG Landing Gear
LGDCIS Landing Gear and Door
Control Indicating System
Control Unit
LGW Landing Gross Weight
LH Left Hand
LIM Limit
LK Leak
LN Left Nose
LNAV Lateral Navigation
LOC Localizer
LOGO Logo Graphic
LOM, MM Compass Locator at Outer Marker
LOP Low Oil Pressure
LP Low Pressure
LPM Liter Per Minute
LPT Lo Pressure Turbine
LR Left Rear
LRC Long Range Cruise
LRN Long Range Navigation
LSB Lower Side Band
LTG(s) Light(s)
LW Left Wing
LWD Left Wing Down
LWR Lower
M
M Mach Number
m Meter
MAA Maximum Authorized IFR Altitude
MAC Mean Aerodynamic Chord MADC Micro Air Data Computer MAG Magnetic
MAINT Maintenance
MALF Malfunction
MAN Manual
MAP Ground Map (WXR)
MAX Maximum
MAZ MLS Azimuth
MB Millibars
MCA Minimum Crossing Altitude MCL Maximum Climb
MCR Maximum Cruise
MCT Maximum Continuous Thrust MDA Minimum Descent Altitude MEA Minimum Enroute IFR
Altitude
MECH Mechanic
MED Medium
MEL Minimum Equipment List
MFD Multi-function Display
MGP MLS Glideslope
MHz MegaHertz
MI Miles
MID AFT Middle Aftward
MID FWD Middle Forward
MILS .001 of an inch
MIN Minimum
MISC Miscellaneous
MKR Marker
MLG Main Landing Gear
MLS Microwave Landing System MLW Maximum Landing Weight
MM Middle Marker
MMEL Master Minimum Equipment List
MMO Maximum Operating Speed
in Mach Number
MOCA Minimum Obstruction Clearance Altitude
MOD Module
MON Monitor
MPH Miles Per Hour
MRA Minimum Reception Altitude MSG Message
MSL Mean Sea Level
MTG Miles to Go
MTO/MTOW Maximum Take-off Weight MTW Maximum Taxi Weight
MZFW Maximum Zero Fuel Weight Misc
% Percent
& and
° C Degrees Centigrade
° F Degrees Fahrenheit
N
N/A Not Applicable
N2 High Pressure Rotor RPM
NAV Navigation
ND Nose Down, Navigation
Display
NDB (ADF) Nondirectional Beacon (Automatic Direction Finder) NEG Negative
NEUT Neutral
NL Nose Left
NLG Nose Landing Gear
NM Nautical Mile(s)
No. Number
NOPT No Procedure Turn Required NORM Normal
NOSE, N/W Nose Wheel
NR Nose Right
NU Nose Up
O
OAT Outside Air Temperature
OBS Observer
OEI One Engine Inoperative OEW Operating Empty Weight OH, OVHD Overhead
OK Okay
OM Outer Marker
OVBD Overboard
OVHT, OH Overheat
OVLD Overload
OVSP Overspeed
OVSPD Overspeed
OVTEMP Over Temperature
OXY, O2 Oxygen
P
P#6 Panel 6
P/S Pitot/Static
PA Passenger Address
PASS Passenger
PBE Portable Breathing Equipment (Smoke Hood)
PCU Power Control Unit
PFD Primary Flight Display PLA Power Lever Angle
PLT(s) Pilot(s)
PNLS(s) Panel(s)
PO Outside Air Pressure
POS Position
PPH Pounds Per Hour
PRESS Pressure, Pressurization PRI/PRIM Primary
PROC Procedure
PROT Protection
PROX Proximity
PRV Bleed Pressure Regulating and Shut-off Valve
PSI Pounds Per Square Inch PSID Pounds Per Square Inch Differential
PSIG Pounds Per Square Inch Gauge
PSU Passenger Service Unit PTCT Protect
PTT Push To Talk
PWR Power
Q
QAR Quick Access Recorder QEC Quick Engine Change
QFE Local Station Pressure QNH Altimeter Setting
QTY Quantity
R
R Right
Advisory (TCAS)
RADALT Radio Altimeter
RAIM Receiver Autonomous
Integrity Monitor
RAT Ram Air Turbine
RAT GEN Ram Air Turbine Generator RATLC Ram Air Turbine Line Contactor
RCCB Remote Controlled Circuit Breaker
RCDR Recorder
RCVR Receiver
R/D Refuel/Defuel
RDCP Refuel/Defuel Control Panel RDR Radar
REC Receiver, Recorder
RECIRC Recirculation
RECOG Recognition
REF(s) Reference(s)
REFL Refuel
REV Reverse
RH Right Hand
RMI Radio Magnetic Indicator RMU Radio Management Unit
ROT Rotation
RPM Revolutions Per Minute
RSB Radio System Bus
RT, R/T Receiver-Transmitter
RTE Route
RTE DATA Route Data
RTO Rejected Take-off
RTU Radio Tuning Unit
RUD Rudder
RVR Runway Visual Range
RVSR Reverser
RW Right Wing
RWD Right Wing Down
RWY Runway
S
S Status
SAT Static Air Temperature
SBY, STBY Standby
SCAV Scavenge
SCR Selector (Nav source)
SCV Surge Control Valve
SEC Second, Secondary
SEL Select, Selector
SELCAL Selected Call
SENS Sensitivity, Sensor
SERV, SVCE Service
SFCU Slats and Flaps Control Unit SID Standard Instrument Departure
SOV Shut-off Valve
SP, SPD Speed
SPC Stall Protection Computer SPKR Speaker
SPLR(s) Spoiler(s)
SPS Stall Protection System
SQ Squelch
SSB Single Side Band
STA Station
STAB Stabilizer
STAT Status
STD Standard
STEER Steering
SUPPL Supply
SW(s) Switches
SYN Synchronize
SYNC Synchronous
SYS, SYST System
T
T/C Top of Climb
T/D Top of Descent
TA Traffic Advisory (TCAS) TACAN UHF Tactical Air Navigation Aid
TAS True Airspeed
TAT Total Air Temperature
TCAS Traffic Alert and Collision Avoidance System
TCS Touch Control Steering
TE Trailing Edge
TEMP Temperature
TGT Turbine Gas Temperature or Target
TLC TRU Line Contactor
TMS Thermal Management
System
TO, T/O Take-off
TOL Tolerance
T/R Thrust Reverser
TRB, TURB Turbulence
TRK Track
TRM Trim
TRU Transformer Rectifier Unit TST Test
TTC TRU Transfer Contactor
U
UNSCHD Unscheduled
USB Upper Side Band
USG United States Gallons
UTIL Utility
V
V Volt
VB Design Speed for Maximum
Gust Intensity
VC Design Cruising Speed
VD Design Diving Speed
VDF/MDF Demonstrated flight diving speed
VEF Engine Failure Speed
VF Design Flap Speed
VFC/MFC Maximum Speed for Stability Characteristics
VFE Maximum Flap Extended
Speed
VLE Maximum Landing Gear
Extended Speed
VLO Maximum Landing Gear
Operating Speed
VLOF Lift-off Speed
VMC Minimum Control Speed with
the Critical Engine
Inoperative
VMO/MMO Maximum Operating Limit Speed
VMU Minimum Unstick Speed
VR Rotation Speed
VS Stalling Speed or the
Minimum Steady Flight
Speed at which the Airplane
is Controllable
VS0 Stalling Speed or the
Minimum Steady Flight
Speed in the Landing
Configuration
VS1 Stalling Speed or the
Minimum Steady Flight
Speed Obtained in a Specific Configuration
V1 Take-off Decision Speed (formerly Denoted as Critical Engine Failure Speed)
V2 Take-off Safety Speed
V2 MIN Minimum Take-off Safety Speed
V/L VOR/Localizer
V/S, VS Vertical Speed
VERT Vertical
VF Variable Frequency
VFG Variable Frequency
Generator
VFR Visual Flight Rules
VG Vertical Gyro
VHF Very High Frequency
(30 ? 300 MHz)
VIGB Variable Inlet Guide Vanes VMC Visual Meteorological Conditions
VNAV Vertical Navigation
VOL Volume
VOLT Voltage
VOR VHF Omnidirectional Range Station
VORTAC VOR and TACAN Co-located VSI Vertical Speed Indicator
W
W Warning
W/C Wind Component
W/S Wind Shear
W/W Wheel Well
WAI Wing Anti-Ice
WAIV Wing Anti-Ice modulating and Shut-off Valve
WARN Warning
WF Runway Length Limited
Weight
Wf Fuel Flow In Pounds Per
Hour
WGT Weight
WHLS Wheels
WIND Window
WOW Weight-On-Wheel
WPT(s) Waypoint(s)
WRN Warning
WS Second Segment Limited
Weight
WTC Windshield Temperature Control
WSHLD Windshield
WX Weather
WXR Weather Radar
X
X Cross Transfer
XFEED Crossfeed
XFER, XFR Transfer
XFLOW Cross Flow
XMIT Transmit
XPNDR Transponder
XTK Cross Track
XWC Cross Wind Component
Y
Y/D, YD Yaw Damper
Z
ZFW Zero Fuel Weight