Subject area F of 13
Engine Electrical Systems
5-15% of the A&P Powerplant test, about 5 to 15 of the 100 questions. The FAA's test standard lists 10 knowledge elements and 4 risk management elements for this area. Here is every one, plus sample questions to try.
What the FAA tests
From the aviation mechanic test standard, FAA-S-ACS-1.
Knowledge: what you must know
- AM.III.F.K1Generators.
- AM.III.F.K2Alternators.
- AM.III.F.K3Starter generators.
- AM.III.F.K4Voltage regulators and overvoltage and overcurrent protection.
- AM.III.F.K5DC generation systems.
- AM.III.F.K6AC generation systems.
- AM.III.F.K7The procedure for locating the correct electrical cable/wire size needed to fabricate a cable/wire.
- AM.III.F.K8The purpose and procedure for paralleling a dual-generator electrical system.
- AM.III.F.K9CSD and IDG systems and components.
- AM.III.F.K10Engine electrical wiring, switches, and protective devices.
Risk management: hazards you must be able to spot and manage
- AM.III.F.R1Polarity when performing electrical system maintenance.
- AM.III.F.R2Actions in response to a warning or caution annunciator light.
- AM.III.F.R3Maintenance on energized aircraft circuits/systems.
- AM.III.F.R4Routing and security of wiring near flammable fluid lines.
Try a sample question
Engine Electrical Systems ยท AM.III.F.K1
Why is a series-wound DC generator never used as an aircraft generator?
Practice all of engine electrical systems
The full course has questions on every element listed here, with an explanation and FAA source for each.