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Boeing Directory - a glossary of terms. The letter P.
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Boeing Directory - a glossary of terms. The letter P.

Boeing Directory - a glossary of terms. The letter P.

 

PACK VALVE

Particles small portion of the substance or physical matter.

PASSENGER ADDRESS

The passenger address system, which provides ads, music on board and warning signals (bell) and cabin crew from the passenger compartment.

PASSENGER ENTERTAINMENT SYSTEM

Entertainment system, a system that provides radio and video transmissions for passenger entertainment.

PCA, SEE - POWER CONTROL ACTUATOR PCA, sm.-POWER CONTROL ACTUATOR.

PCU, SEE - POWER CONTROL UNIT PCU, sm.-POWER CONTROL UNIT.

PEEN

Autofrettage receiving surface greater resistance to corrosion by sealing its heavy material, such for example as steel balls. Also called shock cold deformation.

PERCENT MEAN AERODYNAMIC CHORD (% .MAC)

Mean aerodynamic chord percent (wt%), is determined by the position of the aircraft relative to the mean aerodynamic chord of the wing.

PERCENT N1

PERCENT N1, expresses the speed of low pressure compressor rotor as a constant percentage, rather than rpm.

PERCENT N2

PERCENT N2, expresses rotor speed high-pressure compressor as a constant percentage, rather than rpm.

PERFORMANCE DATA COMPUTER SYSTEM

COMPUTER SYSTEM PERFORMANCE COMPUTING, a system that allows data to achieve maximum efficiency and cost-control aircraft.

PAYLOAD

Payload, ie the goods for delivery, such as passengers, baggage and mail.

PDCS, SEE - PERFORMANCE DATA COMPUTER SYSTEM

PDCS, sm.-PERFORMANCE DATA COMPUTER SYSTEM.

PHASE OF FLIGHT

Flight phase, part of the flight, divided according to specific parts such as takeoff, climb, cruise flight, descent and landing.

PHILLIPS HEAD SCREW

Screw head with crosses, with two perpendicular to the screw slots. Twisted with a screwdriver with a mate ending; PHILLIPS called by the name of the manufacturer. (See. REED and PRICE).

PITCH AXIS, SEE - LATERAL AXIS AXIS pitch sm.-LATERAL AXIS.

PITOT STATIC TUBE

RECEIVER total pressure (static and PIPE PITO pressure) tube in the air flow, which measures the dynamic pressure of the incoming flow, and static pressure. It is used for devices on the plane.

PITCH

PITCH, rotation, rotation of the aircraft about its transverse axis.

PITCH RATE

Changes in pitch, change the angle at which the aircraft is rotating about a transverse axis (nose up, nose down).

PLA, SEE - POWER LEVER ANGLE PLA, sm.-POWER LEVER ANGLE.

PLENUM

Plenums, expansion pipe, which changes the characteristics of traveling by air pressure. Used to remove ripple of change of air flow.

PLEXIGLAS

Plexiglas, registered name of the manufacturer. Transparent akrilikovy plastic material used for the front and side windows of the plane. In everyday life, a piece of plastic of various types are used for different purposes.

PNEUDRAULIC

Pneumohydraulic system or process that is a combination of hydraulic and pneumatic pressure.

PNEUMATIC (NO. 1)

PNEVMATICHESKMY (No.1), cold air, controlled and / or pressure.

PNEUMATIC (NO. 2)

AIR (No.2), air-driven and / or under pressure.

PMC sm.-POWER MANAGEMENT CONTROL.

PITOT TUBE

Pitot tube, the tube in the air flow, which measures the dynamic pressure of the oncoming stream.

PLACARD

LABEL (label), fixed, sign, containing the information or instructions.

POP OUT INDICATOR

INDICATOR Pop-up button on the filter device, which comes out of a recessed position in the case, when a certain differential pressure.

POROSITY

Porosity, pores or small depressions in the material.

POSITION SHIFT

Positional displacement, by driving the FMC, used to change the position of this reference point.

POSITIVE

Positive, positive.

POTENTIOMETER

Potentiometer device for changing the electrical power supply to the circuit elements.

POWER CONTROL ACTUATOR

EXECUTIVE power control mechanism, a hydraulic mechanism assembly for flight controls.

POWER LEVER ANGLE

POWER ANGLE ARM, the angular scale of the main engine management to indicate movement of the handle power rods.

POWER MANAGEMENT CONTROL

CONTROL power control electronic engine management.

POWER TRANSFER UNIT

Power transmission assembly, hydraulic motor-pump to supply hydraulic power components, where there is no normal supply of hydraulic power.

PRECOOLER

Pre-cooler heat exchanger in the air system for cooling air taken from the engine before it is fed into the pipeline.

PRESSURE

Pressure, force per unit area, measured in pounds per square inch.

PRESSURE ALTITUDE

Pressure altitude height, indicate when the barometric pressure on the altimeter is set to mark 29,92 inches of mercury.

PRESSURE REGULATING AND SHUTOFF VALVE

Valve closed FEED and pressure control valve in the pneumatic system to control the pressure bleed air from the engine to the air duct.

PRINTED CIRCUIT CARD

Printed circuit boards, board of plastic or fiberglass with electronic components with copper conductors, forming an electrical circuit.

PROXIMITY SENSOR

Proximity detector, an electromagnetic sensor which senses the position of the roving management mechanism. The sensor has a two or three-wire system.

PROXIMITY SENSOR ACTUATOR

Management mechanism proximity detector, a steel plate on a moving component for controlling the proximity detector.

PROXIMITY SWITCH

ELECTRONICS signaler convergence circuit board for transmitting signals to electrical circuits and lights.

PRIORITY VALVE

PRIORITY VALVE valve in the hydraulic system to control the components in the prescribed manner.

PRSOV, SEE - PRESSURE REGULATING AND SHUTOFF VALVE

PTU, SEE - POWER TRANSFER UNIT

PURGE VALVE

Purge valve, the valve in the pneumatic system to remove dirt from the air.

PYLON

Pylons, structural element for supporting the engine on the wing.

PRSOV, cm.-PRESSURE REGULATING AND SHUTOFF VALVE.

PTU, sm.-POWER TRANSFER UNIT.

 

 

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