FAA-S-ACS-1 (Aviation Mechanic ACS)

Aviation Mechanic Airframe (AMA) practice test

The Airframe section of the Aviation Mechanic knowledge tests. Questions follow the Aviation Mechanic ACS subjects, from metallic and composite structures to landing gear, electrical, instrument, fuel, ice and rain, and fire protection systems. 238 free questions, three choices each like the real test. The actual test has 100 questions in 120 minutes and requires 70% to pass.

Sources: FAA-H-8083-31B Aviation Maintenance Technician Handbook – Airframe, and 14 CFR part 43. Question bank updated 2026-09-22.

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Every question also has its own page with the full explanation, background, and source.

SkyDrill is not affiliated with the FAA. Test format details (question count, time, passing score) come from the ACS and can change; confirm with the current ACS before your test date.