Equipment list items may be identified by an item number and may be grouped logically, using headings such as "Propeller and Propeller Accessories", ＇Engine and Engine Accessories", "Landing Gear", "Electrical Equipment", "Interior Equipment", "Autopilot"

The function and operation of each unit in the system should be described as well as the location of the units.

The index should show the chapter and subchapter in which a circuit of the system appears.

An alphabetical index by subject is to be included in the Introduction, as an assistance in locating the desired circuit.

For simplicity of presentation and understandability, complex systems should be divided into system-function rather than overall master schematic diagrams.

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.