| Abbreviation | Definition |
|---|---|
| NCASP | National Civil Aviation Security Programme |
| ND | Navigation Data |
| ND | Navigation Display |
| NDB | Non Directional Beacon |
| NDB | Non-Directional Beacon |
| NEA | Nitrogen Enriched Air |
| NEXRAD | Next Generation Weather Radars |
| NFF | No Fault Found |
| NFO | Next Flight Out |
| NFPA | National Flight Paramedics Aassociation |
| NGAP | New Generation Aviation Professionals |
| NGAP | Next Generation of Aviation Professionals |
| NGAT | Next Generation Aircraft and Tactics |
| NGCU | Nose [Landing] Gear Control Unit |
| NGS | Nitrogen Generation System |
| NGV | Nozzle Guide Vane |
| NIAC | National Interagency Aviation Committee |
| NIAMAR | National Institute of Aviation Management and Research |
| NIAT | National Institute of Aviation Technologies |
| NICAP | National Investigative Committee of Aerial Phenomena |