Airworthy PrepCommercial Pilot Helicopter test code
CH.II.C.K1Preflight Procedures: Powerplant Starting and Rotor Engagement
Commercial Pilot Helicopter test standard, area of operation II, task C
Written as ch.ii.c.k1 or CH.II.C.K1 on your score report.
The FAA's wording
Starting under various conditions.
What it means
CH.II.C.K1 is a knowledge element in the Preflight Procedures area of operation of the Commercial Pilot Helicopter test standard. A knowledge element is something the FAA expects you to know, and the written test asks questions on it.
- CH
- Commercial Pilot Helicopter ACS
- II
- Area of operation II: Preflight Procedures
- C
- Task C: Powerplant Starting and Rotor Engagement
- K1
- 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 CH.II.C.K1 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-16, Commercial Pilot 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
- Commercial Pilot Helicopter Canadian Conversion (CCH)
- Commercial Pilot Helicopter (CRH)
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.