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Aviation Glossary

An A-Z of all aviation abbreviations.

 
           
  Home
       
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EASA Part 66

 
   

EASA Part 66 Syllabus

 
   

Royal Air Force

 
       
  Flying
       
  Aircraft
   

Glossary

 

 

   

This online glossary provides a comprehensive list of all major aviation abbreviations. If the abbreviation you are looking for is not in this list, please contact us and we will be glad to assist you.

   
   
      Aviation Glossary
 
   

 

 

 

 

LAT

latitude

 

LCD

liquid crystal display

 

LIB

left inboard

 

LCN

load classification number

 

L/G

landing gear

 

LGCIU

landing gear control interface unit

 

LGPIU

landing gear position indicator unit

 

LIS

localiser inertial smoothing

 

LNA

low noise amplifier

 

LNAV

lateral navigation

 

LOB

left outboard

 

LOC

localiser

 

LONG

longitude

 

LP

low pressure

 

LPC

low pressure compressor

 

LPT

low pressure turbine

 

LRRA

low range radio altimeter

 

LRM

line replaceable module

 

LRU

line replaceable unit

 

LVP

low visibility procedure

 

LW

landing weight

 

 

 

 

m

metre

 

Mach

ratio of TAS to the current speed of sound

 

mb

millibar

 

MAT

maintenance access terminal

 

MCP

module control panel

 

MCT

maximum continuous thrust

 

MCDU

multipurpose control and display unit

 

MCU

modular concept unit

 

MDA

minimum descent altitude

 

MEC

main equipment centre

 

MEL

minimum equipment list

 

MES

main engine start

 

MFA

memorised fault annunciator

 

MFD

multi-function display

 

MGSCU

main gear steering control unit

 

MLS

microwave landing system

 

MLW

maximum landing weight

 

MMEL

master minimum equipment list

 

MMO

maximum operating Mach

 

MRO

maintenance, repair and overhaul

 

MRIU

maintenance and recording interface unit

 

MSA

minimum safe altitude

 

MSL

mean sea level

 

MSU

mode selector unit

 

MTBF

mean time between failure

 

MTOW

maximum take-off weight

 

MZFW

minimum zero fuel weight

 

 

 

 

NAVAID

navigational aid

 

NCD

non-computed data

 

ND

navigational display

 

NDB

non-directional beacon

 

notam

notice to airmen

 

NM

nautical mile

 

NW

nosewheel

 

 

 

 

OAT

outside air temperature

 

OBRM

onboard replaceable module

 

OEM

original equipment manufacturer

 

OEU

overhead electronics unit

 

OPAS

overhead panel ARINC system

 

OPBC

overhead panel bus controller

 

OPR

once per revolution

 

OPU

overspeed protection unit

 

OVBD

overboard

 

OVHD

overhead

 

OVHT

overheat

 

OVRD

override

 

OVSPD

overspeed

 

oxy

oxygen