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designed to resist the effect of fire
A
fireproof bulkhead is provided to separate
the cool area of the engine from the
hot area.
fire triangle fire triangle /faə traŋ$əl/ noun
the illustration of the chemistry of fire
as the three sides of a triangle representing
fuel, oxygen and heat
If fuel, oxygen
or heat is removed from the fire triangle,
combustion will cease.
first aid kit first aid kit /f%st ed kt/ noun a
small pack containing plasters, bandages,
antiseptic cream, etc., to be used
in case of an emergency
first officer first officer /f%st ɒfsə/ noun the
officer who is second-in-command to
the captain of an aircraft
FIS FIS abbreviation flight information
service
fishtail fishtail /fʃtel/ verb to move the tail
of an aircraft from side to side as a way
of reducing speed
FISO FISO abbreviation flight information
service operator
fit fit /ft/ adjective in good physical condition,
healthy
Keep fit with diet and
exercise.  noun the exactness with
which surfaces are adjusted to each
other in a machine
There should be a
loose fit between the cylinder and the
piston, the difference being taken up by
the piston rings.  verb 1. to be the correct
size and shape for
Oxygen masks
should fit the wearer properly. 2. to put
on or attach
Wheel fairings, called
spats, are fitted to some light aircraft to
reduce drag. (NOTE: fitting – fitted)
fitment fitment /ftmənt/ noun an act of
attaching or fixing
Attachment points
are supplied for the fitment of heavy
equipment.
fitness fitness /ftnəs/ noun the state or condition
of being physically fit, especially
as the result of exercise and proper eating
habits
The age and physical fitness
of some passengers can be a limiting
factor in an evacuation.  fitness to
fly description of the physical or mental
capabilities a person needs to fly an aircraft
fixed-wing fixed-wing /fkst wŋ/ adjective
referring to an aircraft that has wings
that do not move, rather than rotor
blades
FLFL abbreviation flight level
flag flag /fl$/ noun 1. a usually square or
rectangular piece of cloth with a symbolic
design or colour
Flags are flown
from the signal mast. 2. a small visual
warning or indicating device on the face
of an instrument
There is a warning
flag on the instrument if there is a problem.
flame flame /flem/ noun the usually yellow
area of burning gases seen when something
is burning
Flames were seen
coming from number 2 engine.
flame arrester flame arrester /flem ə|restə/ noun
a device to prevent flame from an external
source from entering a fuel tank
flame out flame out /flem aυt/ verb to cease
from some cause other than the shutting
off of fuel
Air in the fuel line can
cause an engine to flame out or stop.
flame-out flame-out /flem aυt/ noun the ceasing
of combustion in a gas turbine
engine from some cause other than the
shutting off of fuel (NOTE: The word is
also written flameout.)
97 flight attendant
flammable flammable /flməb(ə)l/ adjective
easily ignited and capable of burning
fiercely and rapidly, and therefore hazardous

Aviation gasoline is a flammable
liquid. (NOTE: Flammable and
inflammable mean the same thing.)
flange flange /flnd"/ noun the outside edge
or rim of a part such as a beam or wheel

The web connects the upper and lower
flanges of a beam.
flap flap /flp/ noun a movable control surface
on the trailing edge of an aircraft
wing, used primarily to increase lift and
drag during final approach and landing

Flaps should be retracted immediately
after landing to decrease lift and
therefore increase brake effectiveness.

cowl
COMMENT: Flaps are not usually used
for take-offs in light aircraft except
when a short take-off run is required.
Flaps are not primary control surfaces
of an aircraft.
flare flare /fleə/ noun 1. a stage of the flight
immediately before touchdown when
the nose of the aircraft is raised into the
landing attitude
The approach, flare
and landing can be carried out by automatic
systems. 2. a small rocket-like
device with a bright light, for attracting
attention
flash flash /flʃ/ noun giving off light in
sudden or periodic bursts
Lightning is
　
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