| Acronym |
Definition |
| FADEC |
Full-Authority Digital Engine Control. |
| FAF |
Final Approach Fix. |
| FAI |
Fédération Aéronautique Internationale. |
| FAR |
Federal Aviation Regulations (USA). |
| FARA |
Formula Air Racing Association. |
| FBO |
Fixed-Base Operator |
| FBW |
Fly-By-Wire. |
| FBL |
Fly-By-Light. |
| FCL |
Flight Crew Licensing (Division) |
| FCST |
Forecast. |
| FDR |
Flight Data Recorder, popularly known as a `black box'. |
| Feather (of a propeller) |
to set the angle of CS or VP propeller edge-on to the airflow to minimise drag and rotation following engine failure on multi-engined aircraft. |
| FIC |
Flight Information Centre. |
| FIR |
Flight Information Region. UK airspace is divided into two FIRs, London and Scottish. |
| FIS |
Flight Information Service, providing information to air traffic in the above FIRs |
| FJ |
Fast Jet. |
| FL |
Flight Level. |
| Flameout |
Combustion failure in a turbine engine resulting in power loss. |
| Flicker Effect |
Nausea, dizziness or vertigo which can be brought on by flickering at certain frequencies of a bright light source such as sunlight or strobe when viewed through a rotating propeller or rotor blades. |
| FMS |
Flight Management System. |
| FOD |
Foreign Object Damage. |
| FPM |
Feet Per Minute, a measure of an aircraft's rate of climb or descent. Similarly m/s or mps, meters per second. |
| FSS |
Flight Service Station (USA). |
| FTO |
Flying Training Organization |
