Airworthy PrepFlight Instructor Helicopter test code
HI.II.F.K1dTechnical Subject Areas: Operation of Systems
Flight Instructor Helicopter test standard, area of operation II, task F
Written as hi.ii.f.k1d or HI.II.F.K1d on your score report.
The FAA's wording
Helicopter systems, including:
Transmission and associated drive shafts.
What it means
HI.II.F.K1d is a knowledge element in the Technical Subject Areas area of operation of the Flight Instructor Helicopter test standard. A knowledge element is something the FAA expects you to know, and the written test asks questions on it.
- HI
- Flight Instructor Helicopter ACS
- II
- Area of operation II: Technical Subject Areas
- F
- Task F: Operation of Systems
- K1d
- Part (d) of knowledge element 1
Seeing it on your score report
Your Airman Knowledge Test Report lists a code for each area where you missed a question. Seeing HI.II.F.K1d 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-29, Flight Instructor for Rotorcraft Category Helicopter Rating ACS (November 2023, effective May 31, 2024); FAA Airman Knowledge Testing Matrix (revised 9/25/26), p. 2.
Can be printed on 2 tests
- Flight Instructor Helicopter (FRH)
- Flight Instructor Helicopter (Added Rating) (HFA)
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.