Built-in test equipment

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

Practice AM.II.H.K15 out loud, free

What the ACS says

Built-in test equipment.

A sample oral question on this element

“How does a fault in the FMS reach the maintenance crew?”

Study source: FAA-H-8083-31B (Aviation Maintenance Technician Handbook, Airframe), chapter 10, pages 10-72, 10-73

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.H.K15 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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