This online glossary provides a comprehensive list of all major aviation abbreviations.
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 |
LTA |
lighter-than-air (craft) |
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 |