The Hydraulic Power Transfer Unit system is a hydraulic motor-pump assembly that supplies alternative pressure to leading edge flaps and slats and autoslat system if system B is de-pressurized.

The two most common types of engines used in helicopters are the reciprocating engine and the turbine engine.

Acetone is a heavy-duty degreaser suitable for metal preparation and removing grease from fabric covering prior to doping.

The main frame of the wing includes spars, ribs, stringers, integral fuel tank structure, tip tank supporting structure and frames around openings.

Illustrations should be used whenever they will simplify, shorten, or make the text easier to understand.

Units of measurements shown in manual must be consistent where practical.

The torsion link assembly transmits torsional loads from the axle to the shock strut.

Put a warning notice in the cockpit to tell persons not to operate the flight controls.

This torque shaft cannot move inboard. Thus, before you remove it, remove the outboard torque shaft.

Make sure that you complete the procedure before you tow the airplane back to its initial position.

These words will be very difficult to understand for people from outside of this area.