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F

FEC

Forward error correction (FEC). The process of adding redundant information to the transmitted signal in a manner which
allows correction, at the receiver, of errors incurred in the transmission.


Final Approach

Final approach. That part of an instrument approach procedure which commences at the specified final approach fix or point,
or where such a fix or point is not specified,


a) at the end of the last procedure turn, base turn or inbound turn of a racetrack procedure, if specified; or

b) at the point of interception of the last track specified in the approach procedure; and
ends at a point in the vicinity of an aerodrome from which:


1) a landing can be made; or
2) a missed approach procedure is initiated.


Final approach segment

Final approach segment. That segment of an instrument approach procedure in which alignment and descent for landing are
accomplished.


Final take-off speed

‘Final take-off speed’ means the speed of the aeroplane that exists at the end of the take-off path in the en-route configuration with one engine inoperative


FIR

“flight information region” means an airspace of defined dimensions designated by the
appropriate ATS authority within which flight information service and alerting service are
provided.


Fire-resistant

‘Fire-resistant.’ With respect to materials, components and equipment, means the capability to withstand the application of heat by a flame, as defined for ‘Fireproof‘, for a period of 5 minutes without any failure that would create a hazard to the aircraft.


NOTE: For materials this is considered to be equivalent to the capability of withstanding a fire at least as well as aluminium alloy in dimensions appropriate for the purposes for which they are used.


Fireproof

‘Fireproof.’ With respect to materials, components and equipment, means the capability to withstand the application of heat by a flame, for a period of 15 minutes without any failure that would create a hazard to the aircraft. The flame will have the following characteristics:-


Temperature 1100°C * 80°C
Heat Flux Density 116 KW/m2 10 KW/m2


NOTE: For materials this is considered to be equivalent to the capability of  withstanding a fire at least as well as steel or titanium in dimensions appropriate for the purposes for which they are used.


First aid oxygen

‘First aid oxygen’ means the additional oxygen provided for the use of passengers, who do not satisfactorily recover following subjection to excessive cabin altitudes, during which they had been provided with supplemental oxygen.


Fixed light

Fixed light. A light having constant luminous intensity when observed from a fixed point.


Flap extended speed

‘Flap extended speed’ means the highest speed permissible with wing-flaps in a prescribed extended position.



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