ACS codes · Powerplant · Engine Fuel and Fuel Metering Systems
AM.III.I.K11 · Knowledge
Fuel heaters
Updated October 25, 2026 · element text from the FAA Aviation Mechanic ACS (FAA-S-ACS-1)
Practice AM.III.I.K11 out loud, free
What the ACS says
Fuel heaters.
A sample oral question on this element
“What does a fuel heater do for a turbine engine fuel system?”
Study source: FAA-H-8083-32B (Aviation Maintenance Technician Handbook, Powerplant), chapter 2, page 2-42
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.III.I.K11 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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