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with her request until it was
granted.
persistence persistence /pə|sstəns/ noun 1. the
fact of continuing to exist and not disappearing

The persistence and movement
of cols is governed by the movement
of the adjacent pressure systems.
2. the act of continuing to do something
and not giving up
He managed to
overcome his difficulties through persistence
and hard work.
personnel personnel /p%sə|nel/ noun a body
of people involved in a common purpose
such as work
Smoke masks are
available for use by personnel within
the aircraft.
PFCU PFCU abbreviation power flying control
unit
PFD PFD abbreviation primary flight display
phase phase /fez/ noun 1. a stage or part

An emergency situation may occur during
any phase of the flight. 2. the relationship
between voltage and current

The CSDU (constant speed drive unit)
drive shaft turns the permanent magnet
generator and single phase AC (alternating
current) is induced in the winding
on the stator.
phase angle phase angle /fez ŋ$(ə)l/ noun
the difference between two periodic
phenomena expressed as an angle
phase difference phase difference /fez
df(ə)rəns/ noun a measure of phase
angle from any VOR radial related to
that on bearing 360°
phenomenon phenomenon /fə|nɒmnən/ noun an
occurrence or circumstance which can
be perceived by the senses
Metal
fatigue is not a modern phenomenon.

Of all meteorological phenomena,
thunderstorms present the greatest hazard
to aviation. (NOTE: The plural form
is phenomena.)
photographic film photographic film /fəυtə$rfk
flm/ noun a celluloid material usually
contained in a small metal cylindrical
casing for use in cameras
physical physical /fzk(ə)l/ adjective 1.
referring to matter and energy or the
sciences dealing with them, especially
physics
Oxygen and nitrogen together
constitute 99% of the atmosphere and
171 pitch trim
obey the physical laws as any other gas.
2. referring to the human body
In
some aircraft operating for long periods
at high altitudes, physical discomfort
may arise from low relative humidity.
 physical fitness the state of health
of the body
PIC PIC abbreviation pilot in command
piece piece /pis/ noun a bit, portion or part

The upper and lower skin panel of
each wing can be made in one piece.
(NOTE: Piece is often used to show one
item of something which has no plural:
a piece of equipment; a piece of information.)
 piece of equipment an item
of equipment
Early rescue depends on
rapid location of survivors and the survival
beacon is the most important
piece of equipment in this regard.
pilot pilot /palət/ noun 1. a person who
operates an aircraft in flight 2. the part
of a system or device that leads the
whole  verb to operate or guide
to
pilot an aircraft
COMMENT: A pilot holding a private or
commercial pilot’s licence may log as
pilot-in-command time only the flight
time during which he or she is the only
operator of the aircraft’s flying
controls.
pilot in command pilot in command /palət n kə|
mɑnd/ noun the pilot who has responsibility
for the operation and safety of
the aircraft during flight time. Abbreviation
PIC
Pilot’s Operating Handbook Pilot’s Operating Handbook
/paləts ɒpəretŋ hndbυk/ noun a
book giving details of an aircraft with
recommendations and instructions
regarding its use. Abbreviation POH
pin pin /pn/ noun a short, usually cylindrical
metal rod
pinpoint pinpoint /pnpɔnt/ noun a visual
observation of the precise position of an
aircraft
The pinpoint is a very positive
means of establishing position, as long
as the feature is properly identified. 
verb to draw attention to
to pinpoint a
problem
pipe pipe /pap/ noun a hollow cylinder or
tube to convey a fluid
a delivery pipe

an exhaust pipe
pipeline pipeline /paplan/ noun a long hollow
cylinder or tube to convey a fluid
such as oil or natural gas
The incompressibility
of liquids enables force to
be transmitted long distances through
pipelines.
piston /pstən/ noun a solid cylinder
that fits into a larger cylinder and moves
　
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