| Abbreviation | Definition |
|---|---|
| LRU | Line Replaceable Unit |
| LRWBCA | Long Range Wide Body Commercial Aircraft |
| LSAP | Loadable Software Airplane Part |
| LSAP | Loadable Software Applications |
| LSP | Loadable Software Part |
| LTAA | Lighter Than Air Aircraft |
| LTB | Left Tie Bus |
| LTCC | London Terminal Control Centre |
| LTFE | Mugla/Milas-Bodrum Airport |
| LUAR | Laboratory Unit Acceptance Review |
| LVDT | Linear Variable Differential Transformer |
| LVIA | Lehigh Valley International Airport |
| LVP | Low Visibility Procedure |
| LWB | Large Wide Body or Wide-body aircraft |
| LWS | Left Wheel Speed |
| LWS | Left Wing Spar |
| LWS | Left Wing Station |
| LWS-FA | Left Wheel Speed - Front Axle |
| LWS-RA | Left Wheel Speed - Rear Axle |
| M18 | Mooney Mite M-18 |