Powerplant

Powerplant

The complete installation of an aircraft engine, propeller, and all accessories needed for its proper function.

Industry: Aviation

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Powerplant

pinion

Aviation; Aircraft maintenance

A small gear that meshes with and drives a larger gear.

carburetor air bleed

Aviation; Aircraft maintenance

A small hole in the fuel passage between the float bowl and the discharge nozzle of a float carburetor. Air drawn into the liquid fuel through the air bleed breaks the fuel up into an emulsion, ...

malfunction and defect (M&D) report

Aviation; Aircraft maintenance

A small postcardlike form (FAA Form 8330) used by repair stations, maintenance shops, and technicians to report an unacceptable condition to the FAA. Information on these forms provides the basis for ...

auxiliary power unit (APU)

Aviation; Aircraft maintenance

A small turbine- or reciprocatingengine-powered generator, hydraulic pump, and air pump. APUs are installed in the aircraft and are used to supply electrical power, air, and hydraulic pressure when ...

jeweler’s file

Aviation; Aircraft maintenance

A small, fine-cut, metalworking file used by jewelry manufacturers.

slip ring

Aviation; Aircraft maintenance

A smooth, continuous ring of brass or copper mounted on the rotor shaft of an electrical generator or alternator. Brushes riding on the smooth surface of the slip ring carry current into and out of ...

babbitt

Aviation; Aircraft maintenance

A soft silvery metal used for main bearing inserts in aircraft reciprocating engines. Babbitt is made of tin with small amounts of copper and antimony.