Airworthy PrepA&P Powerplant test code
AM.III.M.K4Propellers
A&P Powerplant test (Section III), subject M
Written as am.iii.m.k4 or AM.III.M.K4 on your score report.
The FAA's wording
Constant speed propeller and governor theory and operation.
What it means
AM.III.M.K4 is a knowledge element in the Propellers subject of the A&P Powerplant test. A knowledge element is something the FAA expects you to know, and the written test asks questions on it.
- AM
- Aviation Mechanic, the mechanic test standard
- III
- Section III: Powerplant
- M
- Subject: Propellers
- K4
- Knowledge element 4
Seeing it on your score report
Your Airman Knowledge Test Report lists an ACS code for each question you missed. Seeing AM.III.M.K4 there means at least one of your wrong answers was on this element. The examiner retests every code on your report during the oral part of the practical test, so study it before then.
Sources: Aviation Mechanic ACS Companion Guide, FAA-G-ACS-1 (Change 2), ch. 2, p. 11 and ch. 5, p. 19; FAA-S-ACS-1, Appendix 1, p. A-1.
The examiner will ask about the codes you missed
"All deficient knowledge areas, as indicated by the ACS codes on the AKTRs, are retested during the oral portion of the test."
Your oral test is 4 random questions plus one for every code on your report, closed book. Our A&P Oral & Practical course builds a mock oral from the codes you tick, with a model answer and FAA source for every question, and a guide for every practical project. $49.
See Oral & PracticalTry a sample question on AM.III.M.K4
A constant-speed propeller uses governor oil pressure to move the blades to low pitch and blade flyweights to move them to high pitch. The aircraft dives and the engine starts to overspeed. What does the governor do?
Practice propellers
The full A&P Powerplant course has questions on every element in this subject area, with an explanation and FAA source for each.