Acronyms
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L
| Acronym | Meaning | Source |
| L | Left (runway identification) | AIS |
| L | Locator (see LM, LO) | AIS |
| LAAS | Local Area Augmentation System | |
| LAHSO | Land and Hold Short Operations | AIS |
| LAME | Licensed Aircraft Maintenance Engineer | CASR Part 66 |
| LAN | Inland | AIS |
| LAT | Latitude | AIS |
| LDA | Landing distance available | ICAO/AIP |
| LDG | Landing | AIS |
| LDI | Landing Direction Indicator | AIS |
| LDP | Landing decision point | ICAO |
| LEN | Length | AIS |
| LF | Low Frequency (30 to 300 KHZ) | AIS |
| LGT | Light, Lighting | AIS |
| LGTD | Lighted | AIS |
| LIH | Light Intensity High | AIS |
| LIL | Light Intensity Low | AIS |
| LIM | Light Intensity Medium | AIS |
| LIOL | Low Intensity Obstacle Lights | AIS |
| LIRL | Low Intensity Runway Lights | AIS |
| LJR | Low Jet Route | AIS |
| LL | Lower Limit | AIS |
| LLN | Low-level Navigation (by the MIL) | AIS |
| LLO | Low Level Operations (by the MIL) | AIS |
| LLZ | Localizer | AIS |
| LM | Locator (middle) | AIS |
| LMT | Local mean time | AIS |
| LO | Locator (outer) | AIS |
| LOC | Locally, Location, Located, Local | AIS |
| LOE | Lane of Entry | AIS |
| LONG | Longitude | AIS |
| LOSA | Line Operations Safety Audit | |
| LPT | Liquid Penetrant Test | |
| LRCS | Long-range communication system | FAR |
| LRG | Long Range | AIS |
| LRI | Line Replaceable Item | WATOG |
| LRNS | Long-range navigation system | FAR |
| LRU | Line Replaceable Unit | WATOG |
| LSA | Light Sport Aircraft | |
| LSALT | Lowest safe altitude | |
| LSG | CASA's Legal Services Group | CASA |
| LTD | Limited | AIS |
| LUL | Lowest Usable Level | AIS |
| LV | Light and Variable (relating to wind) | AIS |
| LVE | Leave, Leaving | AIS |
| LVL | Level | AIS |
| LYR | Layer, Layered | AIS |