Airworthy PrepAirline Transport Pilot Airplane test code
AA.II.C.K4Preflight Procedures: Taxiing (ASEL, AMEL)
Airline Transport Pilot Airplane test standard, area of operation II, task C
Written as aa.ii.c.k4 or AA.II.C.K4 on your score report.
The FAA's wording
Appropriate aircraft lighting for day and night operations.
What it means
AA.II.C.K4 is a knowledge element in the Preflight Procedures area of operation of the Airline Transport Pilot Airplane test standard. A knowledge element is something the FAA expects you to know, and the written test asks questions on it.
- AA
- Airline Transport Pilot Airplane ACS
- II
- Area of operation II: Preflight Procedures
- C
- Task C: Taxiing (ASEL, AMEL)
- K4
- Knowledge element 4
Seeing it on your score report
Your Airman Knowledge Test Report lists a code for each area where you missed a question. Seeing AA.II.C.K4 there means at least one of your wrong answers was on this element. If you are taking the practical test next, expect the examiner to ask about it. Retaking the written? Start with this code and the others on your report.
Sources: FAA-S-ACS-11A, Airline Transport Pilot and Type Rating for Airplane Category ACS (November 2023, effective May 31, 2024); FAA Airman Knowledge Testing Matrix (revised 9/25/26), p. 2.
Can be printed on 4 tests
- Airline Transport Pilot Multiengine Airplane Canadian Conversion (ACM)
- Airline Transport Pilot Single Engine Airplane Canadian Conversion (ASC)
- Airline Transport Pilot Multiengine Airplane (ATM)
- Airline Transport Pilot Single Engine Airplane (135) (ATS)
Got more than one code on your report?
Paste them all into the free study planner and it groups them by subject, most missed first.