LROPS  Long Range Operations 
LRRA  Low Range Radio Altimeter 
LRU  Line Replaceable Unit 
LS  Line Select Key 
LS  Loudspeaker 
LS  Low Speed 
LS  Landing System 
LSA  Low Speed Aileron 
LSA  Low Specific Activity Radioactive Material 
LSB  Least Significant Bit 
LSC  Least Significant Character 
LSI  Large Scale Integrated/Integration/Integrator 
LSP  Low Speed 
LSR  Load Shedding Relay 
LSR  Last Significant Bit 
LSU  Lavatory Service Unit 
LT  Light 
LT  Teleloading 
LTD  Limited 
LTD PLT  Lighted Plate 
LTG  Lighting 
LTK  Load Tonne Kilometre 
LTM  Livestock Transportation Manual 
LTP  Left Top Plug 
LTR  Lab Test Request 
LTS  Lights 
LTS  Load and Trim Sheet Software 
LV  Low Voltage 
LVDT  Linear Variable Differential Transducer 
LVL  Level 
LVL/CH  Level Change 
LVR  Louver 
LVR  Lever 
LVT  Linear Voltage Transducer 
LW  Landing Weight 
LWR  Lower 
LWSA  Lavatory Water Supply Assy 
L/D  Lift/Drag 
L/G  Landing Gear 
L/HIRF  Lightning/High Intensity Radiated Fields 
M  Maneuvering Speed (EFIS) 
M  Magenta 
m  Meter 
M  Mode 
M  Mach Number 
M  Mach 
m3  Cubic Meter 
MA  Milli-Ampere 
MA  Maintenance Annunciator 
MAA  Maximum Authorized IFR Altitude 
MAAP  Members and Associated Partners 
MABH  Minimum Approach Breakoff Height 
MAC  Mean Aerodynamic Chord 
MAC  Maintenance Action Classification 
MACT  Module Application Configuration Table 

MADAR  Malfunction Detection Analysis and Recording Subsystem 
MAF  Maintenance Access Function