TECHNICAL AVIATION ACRONYMS

A

ABS:

- Automatic Braking System

- Anti-lock Braking System

ABU:

Auto Brake Unit

AC:

-Alternating Current

-Air Conditioning

A/C (a/c):

Aircraft

ACARS:

Aircraft Communications Addressing And Reporting System

ACC:

Air Conditioning Controller

ACFT:

Aircraft

ACM:

Air Cycle Machine

ACP:

Audio Control Panel

ADAS:

Auxiliary Data Acquisition System

ADC:

Air Data Computer

ADF:

Automatic Direction Finding/Finder

ADG:

Air Driven Generator

ADI:

Attitude Direction Indicator

ADL:

Airborne Data Loader

ADMS:

Airborne Data Monitoring System

AF:

Audio Frequency

AFC:

Automatic Frequency Control

AFM:

Approved Flight Manual

AFS:

Auto Flight System

AFSC:

Ancillary Fuel System Controller

AFQGS:

Advanced Fuel Quantity Gaging System

AGCA:

Automatic Ground Controlled Approach

AGCL:

Automatic Ground Controlled Landing

AGL:

Above Ground Level

AGS:

Auto Ground Spoiler

ALTN:

Alternate

ALTNTR:

Alternator

AMM:

Aircraft Maintenance Manual

AMP:

Amperage

AMU:

-Audio Management Unit

-Access Memory Unit

AND:

Aircraft Nose Down

ANT:

Antenna

ANU:

Aircraft Nose Up

AOA:

Angle-Of-Attack

AOVP:

Aft Overhead Panel

AP (A/P):

Autopilot

A/P:

Airplane

APC:

Automatic Phase Control

APU:

Auxiliary Power Unit

APUCP:

Apu Control Panel

A/S:

Anti-Skid

ASC:

Aircraft Systems Controller

ASCP:

Air System Control Panel

ASCU:

Anti-Skid Control Unit

ASE:

Auto Slat Extend

AT (A/T):

Autothrottle

ATA:

Airline Transport Association

ATC:

Air Traffic Control

AVSAT:

Aviation Satellite

B

BIT:

Built-In-Test

BITE:

Built-In-Test Equipment

BTM

Brake Temperature Monitor

BTS:

Brake Temperature Sensor

C

CAC:

Center Accessory Compartment

CADC:

Central Air Data Computer

CAWS:

Central Aural Warning System

CAWU:

Central Aural Warning Unit

CB (C/B):

Circuit Breaker

CBP:

Circuit Breaker Panel

CCRM:

Cabin Crew Rest Module

CCW:

Counterclockwise

CDI:

Course Deviation Indicator

CFDIU:

Centralized Fault Display Interface Unit

CFDS:

Centralized Fault Display System

CFDU:

Centralized Fault Display Unit

CFE:

Customer Furnished Equipment

CFP:

Cargo Fire Panel

CG:

Center Of Gravity

CLG:

Center Landing Gear

CP:

Control Panel

CPA:

Closest Point Of Approach

CPCS:

Cabin Pressure Control System

CPU:

Central Processing Unit

CRC:

Cargo Refrigeration Controller

CRT:

Cathode Ray Tube

CSU:

Cassette Storage Unit

CW:

Clockwise

CWS:

Control Wheel Steering

D

DA:

Drift Angle

DC:

Direct Current

DCAS:

Digitally Controlled Audio System

DCU:

Data Control Unit

DEU:

Display Electronics Unit

DFDAU:

Digital Flight Data Acquisition Unit

DFDR:

Digital Flight Data Recorder

DH:

Decision Height

DLE:

Drooped Leading Edge

DME:

Distance Measuring Equipment

DMU:

-Data Measuring Unit

-Data Management Unit

DSDU:

Data Systems Display Unit

DTG:

Distance To Go

DU:

Display Unit

E

EAD:

Engine &Amp; Alerts Display

ECP:

Electronic Control Panel

ECU:

Electronic Control Unit

EDP:

Engine Driven Pump

EEC:

Electronic Engine Control

EFIS:

Electronic Flight Instrument System

EFOB:

Estimated Fuel On Board

EFCU:

Engine Fuel Control Unit

EGT:

Exhaust Gas Temperature

EIS:

Electronic Instrument System

ELF:

Elevator Load Feel

EO:

Engine Out

EPCU:

Electrical Power Control Unit

EPR:

Engine Pressure Ratio

ESC:

Environmental System Controller

ESCP:

Electrical System Control Panel

ET:

Elapsed Time

ETA:

Estimated Time Of Arrival

ETD:

Estimated Time Of Departure

ETE:

Estimated Time En Route

ETO:

Estimated Time Overhead

F

FADEC:

Full-Authority Digital Electronic Control

FAF:

Final Approach Fix

FCC:

Flight Control Computer

FCOM:

Flight Crew Operating Manual

FCP:

Flight Control Panel

FCU:

Fire Control Unit

FD (F/D):

Flight Director

FDCU:

Fire Detection Control Unit

FDU:

Fire Detection Unit

FF:

Fuel Flow

FFS:

Fuel Flow System

FGS:

Flight Guidance System

FL:

-Flap Limiter

-Flight Level

FMC:

Flight Management Computer

FMA:

Flight Mode Annunciator

FMC:

Flight Management Computer

FMS:

Flight Management System

FMU:

-Fuel Metering Unit

-Flight Management Unit

F/O:

First Officer

FOB:

Fuel On Board

FPA:

Flight Path Angle

FPM:

Feet Per Minute

FPS:

Feet Per Second

FQDU:

Fuel Quantity Display Unit

FQGS:

Fuel Quantity Gauging System

FQBU:

Fuel Quantity Bite Unit

FSC:

Fuel System Controller

FSD:

Fast Slew And Day

G

GA (G/A):

Go-Around

GCP:

Glareshield Control Panel

GCU:

Generator Control Unit

GMT:

Greenwich Mean Time

GPA:

Glide Path Angle

GPM:

Gallons Per Minute

GPS:

Global Positioning System

GPWC:

Ground Proximity Warning Computer

GPWS:

Ground Proximity Warning System

GR:

Generator Relay

GS:

Ground Speed

G/S:

Glideslope

GW:

Gross Weight

H

HF:

High Frequency

HGA:

High Gain Antenna

HMU:

Hydro-Mechanical Unit

HPC:

High Pressure Compressor

HPSOV:

High Pressure Fuel Shutoff Valve

HPT:

High Pressure Turbine

HSC:

Hydraulic System Controller

HSCP:

Hydraulic System Control Panel

I

ID:

Inside Diameter

IDG:

Integrated Drive Generator

IDS:

Ice Detection System

ILS:

Instrument Landing System

IM:

Inner Marker

INS:

Inertial Navigation System

IRS:

Inertial Reference System

IRU:

Inertial Reference Unit

ISA:

International Standard Atmosphere

IVS:

In-Seat Video

L

LCD:

Liquid Crystal Display

LCP:

Lighting Control Panel

LED:

Light Emitting Diode

LIB:

Left Inboard

LOB:

-Left On Board

-Left Outboard

LPC:

Low Pressure Compressor

LPT:

Low Pressure Turbine

LRU:

Line Replaceable Unit

LSAS:

Longitudinal Stability Augmentation System

LSDU:

Load Select Display Unit

LSK:

Line Select Key

LVDT:

Linear Variable Differential Transducer

LW:

Landing Weight

LWD:

Left Wing Down

M

MAC:

Mean Aerodynamic Chord

MAPSP:

Master Attendant Passenger Service Panel

MCDU:

Multifunction Control Display Unit

MCT:

Maximum Continuous Thrust (Engine Rating)

MDA:

Minimum Descent Altitude

MFC:

Manifold Failure Controller

MFCS:

Manifold Fail Control System

MFDS:

Manifold Failure Detection System

MLG:

Main Landing Gear

MLS:

Microwave Landing System

MLW:

Maximum Landing Weight

MM:

Middle Marker

MOM:

Maximum Operating Mach

MSA:

Minimum Safe Altitude

MSC:

Miscellaneous System Controller

MSL:

Mean Sea Level

MTOGW:

Maximum Takeoff Gross Weight

MTW:

Maximum Taxi Weight

MZFW:

Maximum Zero Fuel Weight

N

N/A:

Not Applicable/Not Available

NBPT:

No Break Power Transfer

NCD:

No Computed Data

ND:

Navigation Display

NDB:

-Navigation Data Base

-Non Directional Beacon

NLG:

Nose Landing Gear

NM:

Nautical Miles

N/P:

Next Page

NRMP:

Non-Reversible Motor Pump

O

OAT:

Outside Air Temperature

OD:

Outside Diameter

OEW:

Operators Empty Weight

OM:

Outer Marker

P

PA:

Passenger Address

PAS:

Pitch Attitude Sensor

PDL:

Portable Data Loader

PFD:

Primary Flight Display

PLI:

Pitch Limit Indicator

PMA:

Permanent Magnet Alternator

PSC:

Pneumatic System Controller

PSI:

Pounds Per Square Inch

PSU:

Passenger Service Unit

PTT:

Push To Talk

PVIS:

Passenger Video Information System

Q

QAR:

Quick Access Recorder

QFE:

Field Elevation Pressure

QNH:

Sea Level Pressure

R

RA:

-Radio Altitude

-Radio Altimeter

RCCB:

Remote Control Circuit Breaker

RCWS:

Roll Control Wheel Steering

RF:

Radio Frequency

RFU:

Radio Frequency Unit

RH:

Right Hand

RIB:

Right Inboard

RLS:

Remote Light Sensor

RMP:

Reversible Motor Pump

ROB:

Right Outboard

ROS:

Right Observer's Station

RPM:

Revolutions Per Minute

R/T:

Receiver/Transmitter

S

SAT:

Static Air Temperature

SATCOM:

Satellite Communications

SCU:

System Control Unit

SD:

System Display

SDCP:

System Display Control Panel

SELCAL:

Selective Calling

SEM:

Standard Electronics Module

SET:

Seat Electronic Terminal

SID:

Standard Instrument Departure

SISP:

Source Input Select Panel

SOV:

Shutoff Valve

SOSV:

Solenoid Operated Shutoff Valve

SP:

-Scratchpad

-Single Pole

SSM:

Slow Slew And Month

T

TA:

Traffic Advisory

TACAN:

Tactical Air Navigation

TAS:

True Air Speed

TAT:

Total Air Temperature

TBD:

To Be Determined

TCAS:

Traffic Alert Collision Avoidance System

TCC

Turbine Case Cooling

TD:

Trim Down

TE:

Trailing Edge

TLA:

Thrust Lever Angle

TO (T/O):

Takeoff

TOC:

Top Of Climb

TOD:

Top Of Descent

TPI:

Tire Pressure Indicator/Transducer

TOGA:

Takeoff And Go-Around

TOGW:

Takeoff Gross Weight

TR:

-Turn Radius

-Transformer Rectifier

-Temporary Revision

T/R:

Thrust Reverser

TRA:

Throttle Resolver Angle

TRF:

Turbine Rear Frame

TRT:

Takeoff Rated Thrust

U

UFOB:

Usable Fuel On Board

UHF:

Ultrahigh Frequency

UTC:

Universal Time Coordination

V

VAC:

Volts Alternating Current

VBM:

Variable Bypass Valve

VCC:

Video Control Center

VCU:

Video Control Unit

VDC:

Volts Direct Current

VDU:

Video Distribution Unit

VHF:

Very-High-Frequency

VOR:

VHF Omnidirectional Range

V/S:

Vertical Speed

VSCU:

Video System Control Unit

VSI:

Vertical Speed Indicator

VSV:

Variable Stator Vane

VTNA:

Variable Turbine Nozzle Actuator

VTR:

-Video Tape Recorder

-Video Tape Responder

W

WBC:

Weight And Balance Computer

WBS:

Weight And Balance System

WCU:

Waste Control Unit

X

XCVR:

Transceiver

XFEED:

Crossfeed

XFER:

Transfer

XFMR:

Transformer

XMIT:

Transmit

XPDR:

Transponder

Y

YD (Y/D):

Yaw Damper

Z

ZFW:

Zero Fuel Weight

ZFWCG:

Zero Fuel Weight Center Of Gravity