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FAT
FAT 1 Flechette anti-tank.
2 Factory acceptance test.
3 Final-approach track.
fat 1 Overweight.
2 Material that can be removed to meet less-severe
requirement, as in civil derivative of military engine.
Fatac Force Aérienne Tactique (F).
fatal accident One in which at least one occupant is
killed; casualties on ground do not qualify.
Fatca Federal ATC authority (Yugoslavia).
Fate 1 Fuzing, arming, test and evaluation.
2 Factory acceptance test equipment.
FATG Fixed air-to-ground, ie against non-moving
target.
fathom Nautical unit of sea depth, 6 ft, 1.8288 m.
fatigue 1 Weakening or deterioration of metal or other
material under load, esp. repeated cyclic load; causes
cracks and ultimately failure.
2 Progressive decline in human ability to carry out
appointed task apparent through lack of enthusiasm,
inaccuracy, lassitude or other symptoms. In any form of
briefing, limits usually quantified in terms of hours or
sorties.
fatigue index Arbitrary scale of airframe structure life
terminating at 100, but capable of being extended to
higher values by modification.
fatigue life Minimum time, expressed in thousands of
hours or specified number of load cycles, that structure is
designed to operate without fatigue failure.
fatigue strength Maximum stress that can be sustained
for specified number of cycles without failure. Also
known as fatigue limit.
fatigue test Test in which specimen is subjected to
known reversals of stress, such as alternate tension and
compression, or cycle of known loads repeatedly applied
and released.
Fatmi Finnish air-traffic management integration.
FATO, Fato Final approach and takeoff [determines
size of heliport].
Fature Federation of Air Transport User Representatives
in Europe [office, London WC2B 6TE] (Int.).
FAU Forward antenna unit.
fault-tree analysis Use of a family-tree structure in order
to establish the probability of failure of any level or
component; the analysis is based on the established
MTBF of each element, some parts being in parallel [four
engines or hydraulic pumps]. This is a findamental procedure
in the PSSA and SSA.
FAUSST Franco-Anglo-US SST Committee
(1964–66).
FAV First-article verification.
fav Fuel available.
favourable unbalanced field A T–O with excess power
available, so that surplus acc/stop distance can give screen
height greater than 35 ft.
FAW Fighter, all-weather (role prefix, UK).
FAWS Future airborne weapon system.
faying surface Overlapping of adjoining skin surfaces
with edges exposed to airstream or to water.
FB 1 Fighter-bomber (role prefix, UK). Also major
subdivision of undergraduate pilots, as alternative to TTT
(USAF).
2 Fingerprint biometrics.
3 Flare block [of cartridges].
FCC
F B 1 Aerodynamic loading due to buffeting pressure
field.
2 Structural buckling factor [highly variable, depending
on construction].
F b 1 Burn time at average thrust (rocket).
2 Body-fixed reference frame.
FBC 1 Fighter-bomber clear-weather day/night.
2 Fan/booster/compressor [module].
3 Fly by cable = mechanically signalled manual FCS.
FBE Fleet battle experiment (USN).
FBG Fighter/Bomber Group (USAAF).
FBH Front-bearing housing.
FBI Frequency and bias injection.
FBL 1 Fly-by-light.
2 FIATA combined transport bill of lading.
FBM 1 Fleet ballistic missile (S adds ‘submarine’ or
‘system’).
FBO 1 Fixed-base operator.
2 Flights between overhauls.
3 Federal budget outlays.
4 Fan-blade off; hence, an * event, * test.
FBPAR Fixed-base precision approach radar.
FBR Fuji bearingless [main] rotor].
FBS 1 Fly-by-speech.
2 Fixed-base simulator.
3 Forward-based system.
4 Flash/bang/smoke.
FBSM Feature-based solid modelling.
FBT Fixed-base tower.
FBVL Fédération Belge de Vol Libre.
FBW 1 Fly-by-wire.
2 Fly-by waypoint.
FBWG Franco-British Working Group [Concorde].
FC 1 First class.
2 Fuel cell.
3 Funnel cloud, tornado or waterspout.
4 Foot-candle[s].
5 Flight crew.
6 Flight cycle.
7 Fibre channel [bus].
F c Fracto-cumulus.
f c Carrier frequency.
F/C Forecast.
FCA 1 Future cycle accumulation (engine).
2 Functional configuration audit (software).
3 Flight-control, or -critical, avionics.
4 Fully controllable array.
5 Frequency control and analysis.
6 Frequency clearance agreement.
7 Flying Chiropractors Association [office, Johnstown,
PA] (US).
FCAC Future combat air capability (RAF).
FC-AE Fibre channel avionics environment.
FCAS 1 Flight-control actuation system [Bell].
2 Future combat air system.
FCB Frequency co-ordinating body.
FCBA 1 Fédération des Clubs Belges d’Aviation.
2 Future carrier-based, or -borne, aircraft (UK,
replaced by FJCA).
FCC 1 Federal Communications Commission (US,
from 1934).
2 Flight-control computer.
3 Flight-connection centre (DAIS.2).
4 Flat conductor cable.
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