Aviation Mechanic - General, Airframe, and Powerplant › I. General › Task F. Ground Operations and Servicing

AM.I.F.S2

Skill

Connect external power to an aircraft.

Study note

Get a short, cited explanation of this element written from the FAA handbooks: the core idea, the numbers that matter, common test traps, and a quick self-check.

From the FAA library

Aviation Maintenance Technician Handbook - Powerplant p. 8-12
Chapter 8: Engine Removal & Replacement › Preparation of Engine for Ground & Flight Testing › Pre-Oiling
allow the engine to be turned over more easily with the starter. Also, connect an external source of electrical power (auxiliary power unit) to the aircraft electrical system to prevent an excessive drain on the aircraft battery. In using some ... inlet side of the engine-driven oil pump must be disconnected to permit the pre-oiler tank to be connected at this point. Then, a line must be disconnected, or an opening made in the oil system at the nose…
Aviation Maintenance Technician Handbook - Airframe p. 9-48
Chapter 9: Aircraft Electrical System › Small Single-Engine Aircraft › External Power Circuit
External Power Circuit Many aircraft employ an external power circuit that provides a means of connecting electrical power from a ground source to the aircraft. External power is often used for starting the engine or maintenance activities on the aircraft ... source with a reverse polarity is connected, the diode blocks current and the external power solenoid does not close. This diagram also shows that external power can be used to charge the aircraft battery or power the aircraft electrical loads…
Aviation Maintenance Technician Handbook - Airframe p. 9-85
Chapter 9: Aircraft Electrical System › Wire Installation & Routing › Wire Shielding
on the left side, (left equipment rack) the backup AC ground return…