ACS codes · Airframe · Environmental Systems
AM.II.G.K10 · Knowledge
Oxygen system maintenance and inspection procedures
Updated October 25, 2026 · element text from the FAA Aviation Mechanic ACS (FAA-S-ACS-1)
Practice AM.II.G.K10 out loud, free
What the ACS says
Oxygen system maintenance and inspection procedures.
A sample oral question on this element
“When you open an oxygen system for maintenance, what precautions do you take?”
Study source: FAA-H-8083-31B (Aviation Maintenance Technician Handbook, Airframe), chapter 16, pages 16-20, 16-21
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.G.K10 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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