To facilitate troubleshooting, repair of circuits, and replacement of components, an identification and coding system should be used.

In the description of the airplane＇s Fuel System, the fuel measurement system shall be explained and need for monitoring and calibrating shall be discussed.

In the description of the airplane＇s Fuel System, the fuel venting system and consequence of allowing it to become plugged shall be discussed.

In the description of the airplane＇s Fuel System, crossfeed and fuel transfer (if appropriate) shall be explained.

In the description of the airplane＇s Propeller, a cutaway drawing of variable pitch propellers may be included.

In the description of the airplane＇s Propeller, if appropriate, feathering, unfeathering, and reversing shall be discussed.

In the description of the airplane＇s Propeller, the propeller and its operation if pitch can be varied shall be deseribed.

In the description of the airplane＇s Engine, abnormal operations should be discussed briefly. This should be held to the minimum that will help a pilot to correct a situation or enable him to describe it to a mechanic. It should not be a maintenance procedure.

In the description of the airplane＇s Engine, any gear reduction system in the engine shall be described.

In the description of the airplane＇s Engine, if an engine fire detection or extinguishing system is available, describe, give principle of operation, and explain how to use these.

In the description of the airplane＇s Engine, any unique engine mounts including shock mounts shall be described.