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Flight crews are frequently provided
provision 182
with a full meteorological briefing.

Each tank is provided with a shut off
valve.
When aquaplaning, a tyre is not
capable of providing directional control
or effective braking.  provided that on
condition that, if
The flight will take
off on schedule provided that the
weather improves.
provision provision /prə|v"(ə)n/ noun 1. providing
something, or what is provided

The provision of fresh air is important
for passengers’ comfort.
Catering
companies are responsible for the provision
of food.
There is a generator for
the provision of emergency power.

The oil tank has provision for filling and
draining. 2. a legal statement which
provides for something such as particular
circumstances
proximity proximity /prɒk|smti/ noun nearness
in space or time
The two aircraft
were in close proximity.
psychological stress psychological stress
/sakəlɒd"k(ə)l stres/ noun a mentally
or emotionally upsetting condition
which affects one’s health
PTT PTT abbreviation press to test/talk
public public /pblk/ noun people in general
 adjective referring to the people
in general
public address system public address system /pblk ə|
dres sstəm/ noun a microphone,
amplifier and loudspeaker set up to
allow one person to be heard by a group
of people
The captain made a public
address (PA) system announcement
asking passengers to remain seated.
Abbreviation PA system
publication publication /pbl|keʃ(ə)n/ noun
1. the act of making something public,
publishing
the publication of the latest
figures 2. a book, magazine, chart,
etc., which has been published
The
book is a Civil Aviation Authority publication.
public relations public relations /pblk r|
leʃ(ə)nz/ noun the task of maintaining
good relations with the public. Public
relations may also involve putting
across a point of view or publicising a
product.
The arrangements for the
VIPs are being handled by the public
relations department. Abbreviation PR
publish publish /pblʃ/ verb to prepare and
issue a book, magazine, chart, etc., and
sell or distribute it to the public
All
known air navigation obstructions in
the UK are published in the Air Pilot.
pull out pull out /pυl aυt/ verb to stop a dive
in an aircraft and return to level flight
pullout pullout /pυlaυt/ noun a manoeuvre
in which an aircraft changes from a dive
to level flight
pulse pulse /pls/ noun a single vibration of
electric current
pulse modulation pulse modulation /pls
mɒdjuleʃ(ə)n/ noun the use of a
series of short pulses, which are modified
by an input signal, to carry information
pump pump /pmp/ noun a device with
rotary or reciprocating action which is
used to move fluids along pipes or for
compressing fluids  verb to move or
compress a fluid by means of a pump

Fuel is pumped from the tanks to the
carburettor.
COMMENT: Most modern aircraft are
fitted with hydraulic pumps driven from
the engine. Other types of pumps may
be found, but these are usually used to
power emergency systems. Pumps
can be driven directly from the engine
gearbox, by an electric motor, or by air.
pure pure /pjυə/ adjective not mixed with
something else
Inner tubes for tyres
are made of pure rubber.
Magnesium
does not possess sufficient strength in
its pure state for structural uses.  pure
aluminium aluminium which has not
been combined with any other metal to
create an aluminium alloy
purple airway purple airway /p%p(ə)l eəwe/
noun an area of temporarily controlled
airspace, established to provide special
protection to Royal flights in fixedwing
aircraft, in which additional rules
for air traffic apply at all times and in all
weathers
purpose purpose /p%pəs/ noun 1. function

The purpose of the engine is to convert
heat energy to mechanical energy. 2. a
use
For practical purposes, any
straight line drawn on a Lambert’s
chart represents a great circle.  gen-
183 pyrotechnic
eral purpose for all-round or general
use
push-back push-back /pυʃ bk/ noun the process
of pushing a plane out from its
　
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