Aviation Mechanic - General, Airframe, and Powerplant › II. Airframe › Task K. Aircraft Electrical Systems

AM.II.K.R1

Risk management

Testing/troubleshooting electrical systems or components.

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

Helicopter Flying Handbook p. 4-16
Chapter 4: Helicopter Components, Sections, and Systems › Electrical Systems
alternator or generator causes the load meter to indicate zero. Electrical switches are used to select electrical components. Power may be supplied directly to the component or to a relay, which in turn provides power to the component. Relays ... used when high current and/or heavy electrical cables are required for a particular component, which may exceed the capacity of the switch. Circuit breakers or fuses are used to protect various electrical components from overload. A circuit breaker pops…
14 CFR Part 43 — Maintenance, Preventive Maintenance, Rebuilding, and Alteration Open
14 CFR § 43.7 Persons authorized to approve aircraft, airframes, aircraft engines, propellers, appliances, or component parts for return to service after maintenance, preventive maintenance, rebuildi
Persons authorized to approve aircraft, airframes, aircraft engines, propellers, appliances, or component parts for return to service after maintenance, preventive maintenance, rebuilding, or alteration. (a) Except as provided in this section and § 43.17, no person, other than the Administrator ... approve an aircraft, airframe, aircraft engine, propeller, appliance, or component part for return to service after it has undergone maintenance, preventive maintenance, rebuilding, or alteration. (b) The holder of a mechanic certificate or an inspection authorization may approve an aircraft…
Aviation Maintenance Technician Handbook - Airframe p. 16-44
Chapter 16: Cabin Environmental Control Systems › Vapor Cycle Air Conditioning › Vapor Cycle Air Conditioning System Components
Vapor Cycle Air Conditioning System Components By examining each component in the vapor cycle air conditioning system, greater insight into its function can be gained. Refrigerant For many years, dichlorodifluoromethane (R12) was the standard refrigerant used in aircraft vapor cycle ... mixed, nor should one be used in a system designed for the other. Possible damage to soft components, such as hoses and seals, could result causing leaks and or malfunction. Use only the specified refrigerant when servicing vapor cycle…