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CH.I.G — Operation of Systems

CH.I.G for the Commercial Pilot Rotorcraft ACS: official objective, references, and 18 exact knowledge, risk-management, and skill descriptions.

FAA-S-ACS-16, November 2023. This study page does not replace the current FAA publication or an examiner's plan of action.

Official task context

CH.I.G official ACS context
Certificate or ratingCommercial Pilot
Aircraft categoryRotorcraft
Area of operationArea of Operation I. Preflight Preparation
TaskTask G. Operation of Systems
Task code prefixCH.I.G
Official referencesFAA-H-8083-2, FAA-H-8083-21, FAA-H-8083-25; POH/RFM
FAA documentFAA-S-ACS-16 — Commercial Pilot for Rotorcraft Category Helicopter Rating Airman Certification Standards
FAA source libraryOpen the official ACS library

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.

What the ACS code means

  • CH identifies the ACS standard family used for this Commercial Pilot Rotorcraft document.
  • I identifies Preflight Preparation, the Area of Operation.
  • G identifies Operation of Systems, the Task within that Area.
  • K, R, and S identify knowledge, risk-management, and skill elements. The number selects the item; a trailing lowercase letter identifies a listed sub-element.

Knowledge elements

Official ACS knowledge items and mock-oral treatment
ACS codeOfficial descriptionHow a mock oral can probe it
CH.I.G.K1Helicopter systems, including:Explain the element, apply it to a scenario, and connect the answer to current references or aircraft information when relevant.
CH.I.G.K1aFlight controls, trim, and if installed, stability controlExplain the element, apply it to a scenario, and connect the answer to current references or aircraft information when relevant.
CH.I.G.K1bPowerplant(s)Explain the element, apply it to a scenario, and connect the answer to current references or aircraft information when relevant.
CH.I.G.K1cMain rotor and antitorque systemsExplain the element, apply it to a scenario, and connect the answer to current references or aircraft information when relevant.
CH.I.G.K1dTransmission and associated drive shaftsExplain the element, apply it to a scenario, and connect the answer to current references or aircraft information when relevant.
CH.I.G.K1eFuel, oil, and hydraulicExplain the element, apply it to a scenario, and connect the answer to current references or aircraft information when relevant.
CH.I.G.K1fAvionicsExplain the element, apply it to a scenario, and connect the answer to current references or aircraft information when relevant.
CH.I.G.K1gLanding gear, brakes, steering, skids, or floats, as applicableExplain the element, apply it to a scenario, and connect the answer to current references or aircraft information when relevant.
CH.I.G.K1hElectricalExplain the element, apply it to a scenario, and connect the answer to current references or aircraft information when relevant.
CH.I.G.K1iPitot-static, vacuum/pressure, and associated flight instrumentsExplain the element, apply it to a scenario, and connect the answer to current references or aircraft information when relevant.
CH.I.G.K1jEnvironmentalExplain the element, apply it to a scenario, and connect the answer to current references or aircraft information when relevant.
CH.I.G.K1kAnti-icing and deicing, including carburetor heat, if applicableExplain the element, apply it to a scenario, and connect the answer to current references or aircraft information when relevant.
CH.I.G.K2Indications of and procedures for managing system abnormalities or failures.Explain the element, apply it to a scenario, and connect the answer to current references or aircraft information when relevant.

Risk management elements

Official ACS risk management items and mock-oral treatment
ACS codeOfficial descriptionHow a mock oral can probe it
CH.I.G.R1Detection of system malfunctions or failures.Work through a scenario by identifying the hazard, evaluating the risk, and explaining a practical mitigation or decision.
CH.I.G.R2Management of a system failure.Work through a scenario by identifying the hazard, evaluating the risk, and explaining a practical mitigation or decision.
CH.I.G.R3Monitoring and management of automated systems.Work through a scenario by identifying the hazard, evaluating the risk, and explaining a practical mitigation or decision.

Skills elements

Official ACS skills items and mock-oral treatment
ACS codeOfficial descriptionHow a mock oral can probe it
CH.I.G.S1Operate at least three of the helicopter’s systems listed in K1a through K1k.Describe the procedure, interpretation, or decision process that can be discussed during an oral. Physical aircraft performance remains part of the practical test.
CH.I.G.S2Complete the appropriate checklist(s).Describe the procedure, interpretation, or decision process that can be discussed during an oral. Physical aircraft performance remains part of the practical test.

Difficulty data

Difficulty calibration is ongoing for this Task. A difficulty estimate is published only with a sufficiently large, privacy-preserving first directly recorded assessment sample. Any observed difficulty comes from Checkride AI mock-oral practice assessments and is a practice-data proxy, not an FAA practical-test pass or fail rate.

Difficulty calibration remains ongoing until an item clears the private reporting threshold. Percentages, when available, describe the share who needed review on their first directly recorded assessment. Underlying sample sizes are never published, and historical final states are not backfilled into this measure.

How to use this in a mock oral

A mock examiner can ask you to explain the published elements, apply them to the configured aircraft and airport scenario, identify risks, and defend a decision. The prompts are practice scenarios; they are not claimed to be actual FAA examiner scripts or a prediction of the questions you will receive.

Practice in a mock oral

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