Flight Instructor Helicopter test code

HI.XI.J.K1aEmergency Operations: Ground Resonance

Flight Instructor Helicopter test standard, area of operation XI, task J

Written as hi.xi.j.k1a or HI.XI.J.K1a on your score report.

The FAA's wording
Exhibits knowledge of the elements related to ground resonance by describing:
Conditions that contribute to ground resonance.
FAA-S-ACS-29, Flight Instructor for Rotorcraft Category Helicopter Rating ACS (November 2023, effective May 31, 2024), XI. Emergency Operations, Task J. Ground Resonance

What it means

HI.XI.J.K1a is a knowledge element in the Emergency Operations 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
XI: Area of operation XI: Emergency Operations
J: Task J: Ground Resonance
K1a: Part (a) 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.XI.J.K1a 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.

Make a study plan Every code in XI. Emergency Operations