The Aviation Mechanic General (AMG) test is the first of three FAA knowledge tests for the mechanic certificate with Airframe and/or Powerplant ratings. It covers the shared foundations: electricity, drawings, weight and balance, fluid lines, materials and hardware, ground operations, corrosion, math, regulations, physics, inspection and human factors.
Exam format at a glance
| Format | 60 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; you also need the oral and practical tests to earn the mechanic certificate. |
Who this exam is for
- Students at Part 147 aviation maintenance technician schools
- Military and civilian mechanics qualifying through practical experience
- Anyone retaking the AMG who wants to target weak subject areas
How to actually study for it
- Practice Ohm's law, series and parallel circuits, and power calculations until they are automatic.
- Work weight and balance problems: moment = weight × arm, CG = total moment ÷ total weight.
- Know your hardware: AN bolt markings, safety wiring, fittings and tubing sizes.
- Review 14 CFR Parts 43 and 65, Form 337 and maintenance record requirements.
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.