The Aviation Mechanic Powerplant (AMP) test covers reciprocating and turbine engines and their systems: inspection, instruments, fire protection, electrical, lubrication, ignition and starting, fuel metering, induction and cooling, turbine air systems, exhaust and thrust reversers, and propellers.
Exam format at a glance
| Format | 100 multiple-choice questions in 2 hours, at an FAA airman knowledge testing center. |
| Cost | Testing fees are set by the testing center — check current pricing when you schedule. |
| Scoring | The minimum passing grade is 70 percent (14 CFR 65.17). Practice scores here use the same 70% pass line. |
| Validity | Passing the knowledge test is one step; the oral and practical tests complete the Powerplant rating. |
Who this exam is for
- Students at Part 147 aviation maintenance technician schools
- Mechanics qualifying for the Powerplant rating through practical experience
- Anyone retaking the AMP who wants to target weak subject areas
How to actually study for it
- Reciprocating engines and engine electrical systems carry the most weight — know engine theory, compression tests, generators and alternators.
- Learn magneto circuits, impulse couplings and turbine ignition safety.
- Know carburetor and fuel injection basics, plus turbine fuel nozzles and FADEC.
- Review propeller governors, feathering and blade stations.
Where to go next
Start with the free 10-question diagnostic to see where you actually stand, or go straight to the one-page A&P cheat sheet. The full A&P practice exam covers every domain at the real exam's weighting, with every answer explained.