# PH.I.G — Operation of Systems — Private Pilot Rotorcraft ACS

> PH.I.G from FAA-S-ACS-15, including the official objective, references, notes, and 18 exact knowledge, risk-management, and skill descriptions.

Canonical HTML: [https://www.check-ride.ai/acs/rotorcraft/private-pilot/ph-i-g](https://www.check-ride.ai/acs/rotorcraft/private-pilot/ph-i-g)

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

## Official Task context

- FAA document: Private Pilot for Rotorcraft Category Helicopter Rating Airman Certification Standards
- Identifier: FAA-S-ACS-15
- Published source date: November 2023
- Aircraft category: Rotorcraft
- Certificate or rating: Private Pilot
- Area of Operation: Area of Operation I. Preflight Preparation
- Task: Task G. Operation of Systems
- Task code prefix: PH.I.G
- Official references: FAA-H-8083-2, 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 exhibits satisfactory knowledge, risk management, and skills associated with safe operation of systems on the helicopter provided for the flight test.

## Knowledge elements

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

## Risk management elements

- **PH.I.G.R1** — Detection of system malfunctions or failures.
- **PH.I.G.R2** — Management of a system failure.
- **PH.I.G.R3** — Monitoring and management of automated systems.

## Skills elements

- **PH.I.G.S1** — Operate at least three of the helicopter’s systems listed in K1a through K1k.
- **PH.I.G.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.

## Official Task notes

- If K1 is selected, the evaluator must assess the applicant's knowledge of at least three sub-elements.

## 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.