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 cloud cover the amount of
cloud  snow cover a situation in which
there is a layer of snow on top of the
earth so that the earth cannot be seen
coverage /kv(ə)rd"/ noun 1. the
amount of space or time given to a subject,
an event, etc.
More complete coverage
of the one-in-sixty rule is given in
the plotting section of these notes. 2. the
area within which a radar unit can
detect objects
glidepath coverage

localiser coverage
cowl /kaυl/ noun a covering usually
made up of hinged or removable panels
 cowl flap a removable or hinged panel
of a cowl
Further cooling can be
obtained by the use of controllable cowl
flaps which regulate the amount of air
flowing across the cylinders.
cowling /kaυlŋ/ noun a covering
usually made up of hinged or removable
panels
Access to the engine compartment
is normally via hinged cowling
panels.
CPL abbreviation Commercial Pilot’s
Licence
61 cross-pointer indicator
crab crab /krb/ noun a manoeuvre in
which an aircraft is steered slightly into
a crosswind to compensate for flying
slightly off course  verb to steer an aircraft
slightly into a crosswind to compensate
for flying slightly off course
craft craft /krɑft/ noun 1. a boat, etc., for
carrying people or goods on water 2. an
aircraft or spacecraft for carrying people
or goods in the air or in space
An
airship is classified as a lighter-thanair
craft.
crankcase crankcase /krŋkkes/ noun the
part of the engine that houses the crankshaft
and also usually the oil pump
Oil
passages in the crankcase allow lubricating
oil to pass through.
crankshaft crankshaft /krŋkʃɑft/ noun the
part of a piston engine connecting the
pistons, via the connecting rods, to the
flywheel and gearbox
Rpm is the
number of revolutions per minute that
the engine crankshaft is making.
crash crash /krʃ/ noun an accident that
causes damage  verb to have an accident
or collision that causes damage

The aircraft crashed into the sea.
crash-dive crash-dive /krʃ dav/ verb to
move downwards quickly through the
air front first and crash, or cause an aircraft
to do this
crash-land crash-land /krʃ lnd/ verb to
land heavily without using the undercarriage,
so that the aircraft is damaged

The aircraft crash-landed short of the
runway.
crash-landing crash-landing /krʃ lndŋ/ noun
an act of landing an aircraft heavily,
sometimes without the undercarriage

The crash-landing did not damage the
aircraft as much as the pilot expected.
create create /kri|et/ verb to make, to produce

The velocity and pressure of the
exhaust gas create the thrust in the turbojet
engine.
creep creep /krip/ noun 1. a process of
weakening and slow damage to something

Creep is a particular feature of
components which are subjected to
operation at high temperatures. 2. a
slight movement of a tyre on a wheel
caused by landing
Aligned white
marks on the wheel and tyre indicate
that there is no creep.
crest crest /krest/ noun the top of a mountain
or wave
Wind speeds increase
with height, the speed of the wind at the
crest of a mountain or wave being the
greatest.
crew crew /kru/ noun two or more people
who have responsibility for flight operations
criteria criteria /kra|təriə/  criterion
criterion criterion /kra|təriən/ noun a standard
by which you define, decide or
judge something (NOTE: The plural form
is criteria.)  the criterion for promotion
is seniority senior staff will be promoted
first
critical critical /krtk(ə)l/ adjective 1.
extremely important, essential
Temperature
and oil pressure are critical to
any type of system. 2. at which an
important change occurs
As the angle
of attack is increased, it reaches the
critical point when the airflow over the
upper surface of the wing begins to
break down.
cross cross /krɒs/ verb 1. to get from one
side of an area to another  to cross the
Atlantic to go from one side of the
Atlantic to the other 2. to go across each
other at an angle
Meridians intersect
at the poles and cross the equator at
right angles.
cross-check cross-check /krɒs tʃek/ noun verification,
making certain  verb to verify
or make certain
Cross-check doors
　
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