| Abbreviation | Definition |
|---|---|
| FGS | Fine Guidance System |
| FGSE | Fine Guidance System Electronics |
| FH | Flex Hose |
| FHC | Flight Half Coupling |
| FHD | Fixed Head Disk |
| FHF | First Horizontal Flight |
| FHO | Failed HandOver |
| FHP | Fuel High Pressure |
| FHS | Forward Heat Shield |
| FHST | Fixed-Head Star Tracker |
| FI | Fault Identification |
| FI | Flight Instrumentation |
| FI | Formal Inspection |
| FI | Fuel Ignition |
| FIAR | Failure Investigation Action Report |
| FID | Failure IDentification |
| FID | Flight Implementation Directive |
| FIDO | Flight Dynamics Officer |
| FIE | Flight Instrumentation Engineer |
| FIFO | First In, First Out |