171 pitch trim
obey the physical laws as any other gas.
2. referring to the human body . In some aircraft operating for long peri-ods at high altitudes, physical discom-fort may arise from low relative humid-ity. . physical fitness the state of health of the body
PIC abbreviation pilot in command
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 infor-mation.) . piece of equipment an item of equipment . Early rescue depends on rapid location of survivors and the sur-vival beacon is the most important piece of equipment in this regard.
pilot /pa.l.t/ 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 /pa.l.t .n k. mɑnd/ noun the pilot who has respon-sibility for the operation and safety of the aircraft during flight time. Abbrevi-ation PIC

Pilot’s Operating Handbook
/pa.l.ts .p.re.t.. hndbυk/ noun a
book giving details of an aircraft with recommendations and instructions regarding its use. Abbreviation POH
pin /p.n/ noun a short, usually cylindri-cal metal rod
pinpoint /p.np..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 /pa.p/ noun a hollow cylinder or tube to convey a fluid . a delivery pipe
. an exhaust pipe
pipeline /pa.pla.n/ noun a long hol-low cylinder or tube to convey a fluid such as oil or natural gas . The incom-pressibility of liquids enables force to be transmitted long distances through pipelines.
piston /p.st.n/ noun a solid cylinder that fits into a larger cylinder and moves under fluid pressure, as in petrol and diesel engines or compresses fluids, as in pumps and compressors
piston engine /p.st.n end.n/
noun a petrol or diesel engine in which pistons are moved by combustion of fuel, this reciprocating movement pro-ducing rotating movement
piston ring /p.st.n r../ noun one of the metal rings which seals the space between the piston and the cylinder wall
. There should be a loose fit between the cylinder and the piston, the differ-ence being taken up by the piston rings.
pitch /p.t./ noun 1. a nose up/down movement of the aircraft about its lat-eral axis . If the control column is moved forward or aft, the pitch attitude of the aircraft changes. 2. the distance a propeller would advance in one rotation if there was no slip . fine pitch setting and coarse pitch setting angular pro-peller-blade settings . Variable pitch propellers were originally produced with two blade-angle settings – fine pitch to enable full engine speed to be used on take off and coarse pitch to allow an economical engine speed to be used for cruising. . verb to move about the lateral axis . Move the yoke fore and aft to pitch down and up.