Subject area D of 13
Engine Instrument Systems
5-10% of the A&P Powerplant test, about 5 to 10 of the 100 questions. The FAA's test standard lists 11 knowledge elements and 2 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.D.K1Fuel flow.
- AM.III.D.K2Temperature (e.g., exhaust gas, oil, oil cylinder head, turbine inlet).
- AM.III.D.K3Engine speed indicating systems.
- AM.III.D.K4Pressure (e.g., air, fuel, manifold, oil).
- AM.III.D.K5Annunciator indicating systems (e.g., warning, caution, and advisory lights).
- AM.III.D.K6Torquemeters.
- AM.III.D.K7Engine pressure ratio (EPR).
- AM.III.D.K8Engine indicating and crew alerting system (EICAS).
- AM.III.D.K9Digital engine control module (e.g., full authority digital engine controls (FADEC)).
- AM.III.D.K10Electronic centralized aircraft monitor (ECAM).
- AM.III.D.K11Engine instrument range markings and instrument conditions.
Risk management: hazards you must be able to spot and manage
- AM.III.D.R1Maintenance damage to the instrument or indicating system.
- AM.III.D.R2Engine instrument calibration or instrument error.
Try a sample question
Engine Instrument Systems ยท AM.III.D.K9
A technician is asked to check and adjust the ignition timing on a reciprocating engine equipped with a FADEC system. What applies?
Practice all of engine instrument systems
The full course has questions on every element listed here, with an explanation and FAA source for each.