# HI.II.F — Operation of Systems — Flight Instructor Rotorcraft ACS

> HI.II.F from FAA-S-ACS-29, including the official objective, references, notes, and 19 exact knowledge, risk-management, and skill descriptions.

Canonical HTML: [https://www.check-ride.ai/acs/rotorcraft/flight-instructor/hi-ii-f](https://www.check-ride.ai/acs/rotorcraft/flight-instructor/hi-ii-f)

Site reference: [https://www.check-ride.ai/llms.txt](https://www.check-ride.ai/llms.txt)

## Official Task context

- FAA document: Flight Instructor for Rotorcraft Category Helicopter Rating Airman Certification Standards
- Identifier: FAA-S-ACS-29
- Published source date: November 2023
- Aircraft category: Rotorcraft
- Certificate or rating: Flight Instructor
- Area of Operation: Area of Operation II. Technical Subject Areas
- Task: Task F. Operation of Systems
- Task code prefix: HI.II.F
- Official references: FAA-H-8083-2, FAA-H-8083-4, FAA-H-8083-9, FAA-H-8083-21, FAA-H-8083-25; POH/RFM
- FAA source library: https://www.faa.gov/training_testing/testing/acs

## Official Task objective

To determine the applicant understands systems on the helicopter provided for the flight test, can apply that knowledge, manage associated risks, demonstrate appropriate skills, and provide effective instruction.

## Knowledge elements

- **HI.II.F.K1** — Helicopter systems, including:
- **HI.II.F.K1a** — a. Flight controls, trim, and if installed, stability control
- **HI.II.F.K1b** — b. Powerplant(s)
- **HI.II.F.K1c** — c. Main rotor and antitorque systems
- **HI.II.F.K1d** — d. Transmission and associated drive shafts
- **HI.II.F.K1e** — e. Fuel, oil, and hydraulic
- **HI.II.F.K1f** — f. Landing gear, brakes, steering, skids, or floats, as applicable
- **HI.II.F.K1g** — g. Avionics
- **HI.II.F.K1h** — h. Electrical
- **HI.II.F.K1i** — i. Pitot-static, vacuum/pressure, and associated flight instruments
- **HI.II.F.K1j** — j. Environmental
- **HI.II.F.K1k** — k. Anti-icing and deicing, including carburetor heat, if applicable
- **HI.II.F.K2** — Indications of and procedures for managing system abnormalities or failures.

## Risk management elements

- **HI.II.F.R1** — Detection of system malfunctions or failures.
- **HI.II.F.R2** — Management of a system failure.
- **HI.II.F.R3** — Monitoring and management of automated systems.
- **HI.II.F.R4** — Providing instruction in unfamiliar aircraft or operating with unfamiliar flight display systems and avionics.

## Skills elements

- **HI.II.F.S1** — Operate at least three of the helicopter’s systems listed in K1a through K1k.
- **HI.II.F.S2** — Complete the appropriate checklist(s).

## Difficulty methodology

Difficulty calibration is ongoing for this Task. Observed difficulty is a privacy-thresholded check-ride.ai mock-oral practice proxy, not an FAA practical-test pass or fail rate. Underlying sample sizes and the private reporting threshold are not published.

## Use in practice

A mock examiner can ask a pilot to explain the published elements, apply them to the configured aircraft and airport context, identify risks, and defend a decision. Practice prompts are not represented as actual FAA examiner scripts or predictions of the questions a candidate will receive.