Abbreviations

List of abbreviations used in Aviation –

WordAbbrevation
A/D Analog/digital; analog-to-digital
A/D CONV Analog-to-digital converter
A/LAutoland
ACAdvisory Circular
acAlternating current
ACARSARINC Communication Addressing and Reporting System
ACOAircraft Certification Office
ADAirworthiness Directive
ADCAir data computer
ADCPAtC Dual control panel
ADEDSAdvanced electronic display system
ADFAutomatic direction finder
ADIAttitudedirector indicator; air data instrument
AFCAutomatic frequency control
AFCSAutomatic flight control system
AFDSAutopilot flight Director system
AFM Airplane flight manual.
AGL Above ground level.
AIMAeronautical Information Manual
AIRCOMair/grounD communications
ALS approach light system.
AMamplitude modulation
AMP or AMPLamplifier
AMPamperes
AMSAerospace Material Specification
ANArmy/Navy
ANDArmy Navy Design
ANSIAmerican National Standards Institute
ANTAntenna
APAutopilot
APBAuxiliary power breaker
APCUAuxiliary power control unit
APUAuxiliary power unit
ARINCAeronautical Radio Incorporated
ARNC IOARINC I/O error
ARNC STPARINC I/O UARt data strip error
ASR Airport surveillance radar.
ASTMAmerican Society for testing Materials
ATAAir transport Association
ATCAir traffic control
ATCTATC Transponder
ATCTSAtC transponder system
ATS Air Traffic Service.
AUXAuxiliary
AVCAutomatic volume control
AWGAmerican Wire Gauge
AWS Air WeaTher Service
B/CUBattery/charger unit
BAT or BATTBattery
BCDBinary-coded-decimal
BITBinary digit; built-in test
BITEBuilt-in test equipment
BITSBus interconnect transfer switch
BNRBinary numerical reference; binary
BPBand-pass
BPCUBus power control unit
BTBus Tie
BTBBus Tie breaker
BTCBefore top center
BUSElectrical Bus; 429 digital data bus
C.G.Center of Gravity
CACCaution advisory computer
CAGECommercial and government entity code
CAMP Continuous airworthiness maintenance program.
CAS Calibrated airspeed
CAT II Category II..
CAWSCentral aural warning system; caution and warning system
CB, C/B, or CKT/BKRCircuit breaker
CDICourse-deviation indicator
CDUCentral display unit
CFCCarbon fiber composite
CFDIUCentralized fault display interface unit
CHDO An FAA Flight Standards certificate holding district office
CFDSCentralized fault display system
CH or CHANChannel
CHGRCharger
CKTCircuit
CLKClock
CLRClear
CMCSCentral maintenance computer system
CMP Configuration, maintenance, and procedures.
CMPTRComputer
COCarbon monoxide
COAXCoaxial
CONSOL or CONSOLAN A kind of low or medium frequency long range navigational aid.
COPCopper
CPControl panel
CRTCathode ray tube
CSE or CSEU Control system eleCtroniCs unit
CSEUPControl system eleCtroniCs unit panel
CTComputed tomography
CTCurrent transformer
CTNCaution
CUControl unit; Copper
CVRCoCkpit voice recorder
CWContinuous wave
D/ADigital-to-analog
DACDigital-to analog converter
DADCDigital air-Data computer
DBTDead bus tie
DcDirect current
DCDRDecoDer
DDBDigital Data bus
DEMODDemodulator
DEMUXDemultiplexer
DFDRDigital flight Data recorder
DGDirectional gyro
DGTLDigital
DHDecision height
DISC SOLDisconnect solenoid
DISCDisconnect
DISTRDistribution
DMADirecT memory access
DMBDead main bus
DMCDisplay management computer
DMEDisTance measuring equipmenT
DMEADistance measuring equipment antenna
DNDown
DUDisplay unit
E/EE & E electrical/electronic
E11-first shelf, number 1 equipment rack
E22-second shelf, number 2 equipment rack
EADFElectronic automatic direction finder
EADIElectronic attitudE-dirEctor indicator
EAROMElectrically alterablE read-only memory
EAS Equivalent airspeed.
ECEICAS computer
ECAMElectronic centralized aircraft monitoring
EDSPEICAS display select panel
EDUEICAS Display unit
EECElectronic engine control
EFIElectronic flight instrument
EFISElectronic flight instrument system
EFISCPEFIS control panel
EFISCUEFIS comparator unit
EFVS Enhanced flight vision system.
EHSIElectronic horizontal-situation indicator
EHSIDElectronic horizontal-situation indicator display
EHSVElectrohydraulic servo value
EICASEngine indicating and crew alerting system
ELCUElectrical load control unit
ELECElectric; electronic
ELECTElectrical
ELEXElectronics; electrical
ELTEmergency Locator transmitter
EMER GENEmergency generator
emfElectromotive force
EMFIElectromechanical flight instrument
EMIElectromagnetic interference
EP AVAILExternal power available
EPExternal power
EPCExternal power contactor
EPCSElectronic power control switch
EPROMErasable programmable read only Memory
ETOPS Extended-range twin-engine Operational Performance Standards
eVElectron volt
EWIS Electrical wiring interconnection system.
EXCTRExciter
EXT PWRExternal power
FAAFederal AviaTion Administration
FAA PMA Federal Aviation Administration Parts Manufacturer Approval
FFS Full flight simulator.
FMFrequency modulation
FM Fan marker.
FM/CWFrequency modulation continuous wave
FMCFlight management computer
FMCDFlight management computer control display unit
FMCSFlight management computer system
FMSFlight management system
FODForeign object damage
FREQFrequency
FSEUFlap/slat electronic unit
FSTD Flight simulation training Device.
FTD Flight Training Device.
FW or FWDForward
G/SGlide slope
GAL or GALYGalley
GCRGenerator control relay auxiliary contact
GCUGenerator control unit
GEBGenerator circuit breaker
GENGenerator
GLRGalley load relay
GMAWGas metal arc welding
GMTGreenwich mean time; cordinated Universal time
GND PWRGround power
GND RETGround return
GND SVCEGround service
GND or GRDGround
GPCUGround power control unit
GPSGlobal positioning system
GPSWGear opposition switch
GPUGround power unit
GPWGround proximity warning
GPWSGround proximity warning system
GSRGround service relay
GSSRGround service select relay
GSTRGround service transfer relay
GTAWGas tunGsten arc welding
GWPCGround proximity warning computer
H/LHigh/low
HIRL High-intensity runway ligHt system.
HEAHigh-frequency raDio antenna
HF (hf) High frequency (3 to 30 MHz)
HFCPHigh-frequency raDio control panel
HI ZHigh impeDance
HZHerTz
I.D.Inner Diameter
I/OInput/output
IAPSIntegrated avionics processor system
IASIndicated airspeed
ICAO International Civil Aviation Organization.
IDGintegrated drive generator
IFIntermediate frequency
IFRInstrument flight rules
IFSD In-flight shutdown.
IGNIgnition
IISIntegrated instrument system
ILSInstrument landing system
IM ILS inner marker.
INDLIndicator light
INSTInstrument
INSTRInstrument
INT InTersection
INTCONInterconnect
INTECInterface
INTERInterrogation
INTPHInterphone
INVInverter
IR ILSReceiver
kHzKilohertz
KPSIThousands of pounds per square inch
kVKilovolts
kVAKilovoltamperes
kVARKilovoltampere reactive
LBand-radio frequency band (390 To 1550 MHz)
LCDLiquid-crystal display
LDLoad
LEDLight-emitting diode
LF (lf) Low frequency (30 To 300 kHz)
LO ZLow impedance
LOCLocalizer
LRULine replaceable unit
LSLoudspeaker
LSBLower sideband
LSPTMLimit switch position transmitter module
LTLight
LTSLights
LDA LocaLizer-type DirectionaL aid.
LFR Low-frequency radio range.
LMM Compass Locator at middLe marker.
LOC ILS Localizer.
LOM Compass Locator at outer marker.
M Mach number.
MAA Maximum authorized IFR altitude
MACMean aerodynamic chord
MALS Medium intensity approach light system
MALSR Medium intensity approach light system with runway alignMent indicator lights.
MAN/ELECManual/electric
MALS Medium intensity approach light system
MALSR Medium intensity approach light system with runway alignMent indicator lights
MBAMarker-beacon antenna
MCA Minimum crossing altitude.
MCDPMaintenance control and display panel
MCDUMultipurpose control and display unit
MDA Minimum descent altitude.
MDEModern digital electronics
MEA Minimum en route IFR altitude.
MECMain equipment center; main engine control
MEG or MEGAMillion
MEKMethylethylketone
MEL Minimum equipment list.
MEMMemory
MEtOMaximum except-take off
MF(mf) Medium frequency (300 kHz to 3 MHz)
MHzMegahertz
MICMicrophone
MICROMicroprocessor
MIGMetal inert gas
MILLIOne one-thousandth (0.001)
MKR BCNMarker beacon
MM ILS middle marker.
MOCA Minimum obstruction clearance altitude.
MRA Minimum reception altituDe.
MSMilitary standard
MSDSMaterial Safety Data Sheets
MSEC(ms) milliseconDs
MSGMessage
MSL Mean sea level
MTBFMean Time-between-failure
MUXMultiplexer
mVMillivolts
NASNaTional Aerospace Standard
NAVNavigaTion
NCNormally closed; not connected;no connection
NDBNondirectional beacon
NDINondestructive Inspection
NEGNegative
NM Nautical mile.
NOPAC North Pacific area of operation.
NOPT No procedure turn required.
NSEC(ns) Nanoseconds
NTSBNational transportation Safety Board
NVMNonvolatile memory
OAMOriginal aircraft manufacTurer
OBSOmni bearing selection
OCOvercurrent
OEI One engine inoperative.
OEMOriginal equipment manufacturer
OFOver-frequency
OM ILS outer marker.
OPSPECS Operations specifications.
OVV or OVOvervoltage
OVVCO or OVCOOvervoltage cutout
P-SParellel To series
PAPassenger address; Power amplifier
PARA/SERParallel To serial
PACOTS Pacific Organized Track SysTem.
PAR Precision approach radar.
PCUPassenger control unit; Power control unit
PFDPermanent-magnet generator
PMAParts Manufacturer Approval
POSPositive
POTPotentiometer; Plan of test
PRPower relay
PRLParallel
PROMProgrammable read-only memory
PROXProximity
PSEUProximity switch electronic unit
PSIPounds Per square inch
PTRS Performance tracking and RePorting System.
PWRPower
PWR SPLYPower supply
QPLQualified Products List
QTYQuantity
R-TReveiver- transmitter
RARadio altimeter; radio altitude
RADRadio
RAIND Radio altimeter indicator
RAIL Runway alignment indicator light system.
RAMRandom-access memory
RARTRadio altimeteR Receiver-transmitter
RATRam air turbine
RBN Radio beacon
RCCBRemote-control circuit breaker
RCLRecall
RCLM Runway centerline marking.
RCLS Runway centerline light system.
RCVRReceiver
RCVR/XMTRReceiver/transmitter
RDMIRadio distance magnetic indicator
REIL Runway end identification lights
RF (rf) Radio frequency
RFIRadio-frequency interference
RFFS Rescue and firefighting services.
RLSRemote light sensor
RMIRadio magnetic indicator
RNAV Area navigation.
RPMRevolution per minute
RR Low or medium frequency radio range station
RTVRoom temperature vulcanizing
RVR Runway visual range as measured in the touchdown zone area
SAESociety of Automotive Engineers
SALS Short approach light system.
SATStatic air temperature
SATCOMSatellite communication
SCRSilicon-controlleD rectifier
SDISource DeStination iDentifier
SELCALSelective calling system
SER DLSerial Data link
SGSymbol generator
SITASociété International De telecommunications Aeronautiques
SMAWShielded metal arc welding
SMDSurface mounted device
SNRSignal-to-noise ratio
SOLSolenoid
SOLVSolenoid valve
SOMStart of message
SOTStart of transmission
SPKRSpeaker
SPRSoftware problem report
SQLSquelch
SSALS Simplified Short approach light System.
SSALSR Simplified Short approach light System with runway alignment indicator lights
SSBSingle Sideband
SSIDSupplemental Structural Inspection documents
SSMSign status matrix
STSynchro transmitter
STAT INVStatic inverter
STBYStandby
STCSupplemental type Certificate
SWSwiTch
SYM GENSymbol generaTor
T-RTransformer-rectifier
TATTrue air Temperature
TAS True airspeed.
TBDPTie bus Differential protection
TCType CerTificate
TCASTraffic alert and collision avoidance System
TACAN UlTra-high frequency Tactical air navigation air
TCDSType Certificate data Sheets
TDCTop dead center
TDZL Touchdown zone lights.
TFRTransfer
TIGTungsten inert gas
TMCThrust management compuTer
TMSTerminal marking sleeve
TMSThrust managemenT system
TMSPThrust mode select panel
TRUTransformer-Rectifier unit
TSOTechnical Standard Order
TVOR Very high frequency Terminal omnirange station.
TXPdRTransponder
UBRutility bus relay
UFunderfrequency
UHFUltrahigh frequency (300 MHz to 3 GHz)
UNDFUnDerfrequency
UNDVUnDervoltage
USUnderspeed
USB (us)Upper sideband
USECMicroseconds
UVUndervoltage
UVUtraviolet
V ac, Vac, or VACVolts alternating current
V Dc, VDc, or VDC Volts Direct current
VVolts; Voltage; Vertical; ValVe
VAVolt-Amperes
VARVolt-Ampere ReactiVe
VFRVisual flight rules
VHF (vhf) Very high frequency ((30 tO 300 MHz)
VLSIVery large-Scale integration
VORVHF omnirange; Visual omnirange
VORTACVOR tactical air naVigation
VRVoltage regulator
VRMSVolts root means square
V A design maneuvering speed.
V B design speed for maximum gust intensity.
V C design cruising speed.
V d design diving speed.
V DF/ M DF demonstrated flight diving speed.
V EF the speed at which the critical engine is assumed to fail during takeoff.
V F design flap speed.
V FC/ M FC Maximum speed for stability characteristics.
V FE Maximum flap extended speed.
V FTO Final Takeoff speed.
V H Maximum speeD in level flight with maximum continuous power.
V LE Maximum landing gear extended speed.
V LO Maximum landing gear operaTing speed.
V LOF LifT-off speed
V MC Minimum control speed with the critical engine inoperative.
V MO/ M MO Maximum operating limit speed.
V MU Minimum unstick speed.
V NE Never-exceed speed
V NO Maximum structural cruising speed.
V R RoTaTion speed
V REF Reference landing speed.
V S The stalling speed or The minimum sTeady flight speed at which the airplane is controllable.
V S0 The stalling speed or the minimum steady flight speed in the landing configuration.
V S1 The stalling speed or the minimum steady flight speed obtained in a specific configuration.
V SR Teference stall speed.
V SRO Reference stall speed in The landing configuration.
V SR1 Reference stall speed in a specific configuration.
V SW Speed at which one of natural or artificial stall warning occurs.
VTOSS Takeoff safety speed for Category A rotorcraft.
V X Speed for best angle of climb.
V Y Speed for best raTe of climb.
V 2 Takeoff safety speed.
V 2min Minimum Takeoff safeTy speed.
VFR Visual flight rules.
VHF Very high frequency.
VOR Very high frequency omnirange sTaTion.
VORTAC Collocated VOR and TACAN
WWatts
WARNWarning
WCPWeather radar conrol panel
WEAWeather
WEUWarning elecTronics unit power supply
WPTWaypoint
WX (WXR)WeaTher radar
XCVRTransceiver
XDCRTransducer
XFMRTransformer
XFRTransfer
XMITTransmitter
XMTRTransmitter
XPDRTransponder

 

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