Inspection requirements under 14 CFR part 43 and 14 CFR part 91

Updated October 25, 2026 · element text from the FAA Aviation Mechanic ACS (FAA-S-ACS-1)

What the ACS says

Inspection requirements under 14 CFR part 43 and 14 CFR part 91.

A sample oral question on this element

“After a 100-hour inspection, what engine check must you make before returning a reciprocating-engine aircraft to service?”

Study source: 14 CFR Part 43, chapter 43.15, pages 14 CFR 43.15(a), 14 CFR 43.15(c)

If this code is on your test report

Your Airman Knowledge Test Report (AKTR) lists an ACS code for every knowledge area you missed on the written test. On the A&P oral, each of those codes adds one question to that section, on top of a minimum of four random questions (FAA Mechanic Test Generator FAQ). So if AM.III.C.K1 is on your AKTR, expect the examiner to ask about it. More on how codes turn into oral questions: A&P ACS codes: know your codes before the oral.

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