ACS codes · Airframe · Hydraulic and Pneumatic Systems
AM.II.F.K7 · Knowledge
Servicing, function, and operation of accumulators
Updated October 25, 2026 · element text from the FAA Aviation Mechanic ACS (FAA-S-ACS-1)
Practice AM.II.F.K7 out loud, free
What the ACS says
Servicing, function, and operation of accumulators.
A sample oral question on this element
“What purposes does an accumulator serve in an aircraft hydraulic system?”
Study source: FAA-H-8083-31B (Aviation Maintenance Technician Handbook, Airframe), chapter 12, pages 12-29, 12-30, 12-31
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.F.K7 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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