ACS codes · General · Cleaning and Corrosion Control
AM.I.G.K3 · Knowledge
Types and effects of corrosion
Updated October 25, 2026 · element text from the FAA Aviation Mechanic ACS (FAA-S-ACS-1)
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What the ACS says
Types and effects of corrosion.
A sample oral question on this element
“Corrosion shows up in many specific forms. What general classifications cover most of them?”
Study source: FAA-H-8083-30B (Aviation Maintenance Technician Handbook, General), chapter 8, pages 8-2, 8-5, 8-6, 8-7, 8-8, 8-9
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.I.G.K3 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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