ACS codes · General · Regulations, Maintenance Forms, Records, and Publications
AM.I.I.K6 · Knowledge
Maintenance terminology as defined in 14 CFR part 1 (e.g., time in service, maintenance,
Updated October 25, 2026 · element text from the FAA Aviation Mechanic ACS (FAA-S-ACS-1)
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What the ACS says
Maintenance terminology as defined in 14 CFR part 1 (e.g., time in service, maintenance,
A sample oral question on this element
“Under 14 CFR part 1, what does the term maintenance mean?”
Study source: 14 CFR part 1, chapter 1.1, page 14 CFR 1.1
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.I.I.K6 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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