Interrogate, Interrogator INV
Inverter IP
Intermediate Pressure IPC
Illustrated Parts Catalog
IPPU
Instrumentation Position Pick-off Unit IR
Inertial Reference IRS
Inertial Reference System ISA
International Standard Atmosphere ISO
International Standardization Organisation
ISOL
Isolation IVS
Inertial Vertical Speed JAM
Jammed, Jamming
JAR
Joint Airworthiness Requirements L Left L
Length L/G
Landing Gear LA
Linear Accelerometer LAT
Lateral LAT
Latitude
LAV
Lavatory LBP
Left Bottom Plug LCD
Liquid Crystal Display
LCIT
Load Compressor Inlet Temperature
LDG
Landing LE
Leading Edge LED
Light Emitting Diode
LGCIU
Landing Gear Control and Interface Unit LIM
Limit, Limitation, Limiting, Limiter
LKD
Locked LL
Lat/Long
LLDC
Low Level Direct Current Voltage
LMP
Left Middle Plug
LNG
Long
LMS
Leakage Measurement System LO Low
LOC
Localizer
LONG
Longitude
LONGN
Longeron LOP
Low Oil Pressure LP
Low Pressure LPC
Low Pressure Compressor LPT
Low Pressure Turbine
LPTACC
Low Pressure Turbine Active Clearance Control LRU
Line Replaceable Unit LS
Loudspeaker LSB
Least Significant Bit LSI
Large Scale Integration LT
Light LTP
Left Top Plug LV
Low Voltage
LVDT
Linear Variable Differential Transducer LVL
Level LW
Landing Weight
LWR
Lower
MAC
Mean Aerodynamic Chord
MAG
Magnetic
MAINT
Maintenance
MAN
Manual