Identification of life-limited parts and their replacement interval

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

What the ACS says

Identification of life-limited parts and their replacement interval.

A sample oral question on this element

“Under 14 CFR 43.10, what makes a part a life-limited part?”

Study source: 14 CFR, chapter Part 43 § 43.10; Part 91 § 91.417, pages 14 CFR 43.10(a), 14 CFR 43.10(b), 14 CFR 43.10(c), 14 CFR 43.10(d), 14 CFR 91.417(a)(2)

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.II.D.K4 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.

Answer by voice, get follow-up questions and a report tied to FAA handbook pages. No account needed for the free practice. DMEReady is an independent study tool, not affiliated with or endorsed by the FAA.