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AA.II.B — Powerplant Start

AA.II.B for the Airline Transport Pilot Airplane ACS: official objective, references, and 12 exact knowledge, risk-management, and skill descriptions.

FAA-S-ACS-11A, November 2023. This study page does not replace the current FAA publication or an examiner's plan of action.

Official task context

AA.II.B official ACS context
Certificate or ratingAirline Transport Pilot
Aircraft categoryAirplane
Area of operationArea of Operation II. Preflight Procedures
TaskTask B. Powerplant Start
Task code prefixAA.II.B
Official referencesAIM; FAA-H-8083-2, FAA-H-8083-3, FAA-H-8083-25; POH/AFM
FAA documentFAA-S-ACS-11A — Airline Transport Pilot and Type Rating for Airplane Category 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 powerplant start procedures.

What the ACS code means

  • AA identifies the ACS standard family used for this Airline Transport Pilot Airplane document.
  • II identifies Preflight Procedures, the Area of Operation.
  • B identifies Powerplant Start, 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
AA.II.B.K1Normal and abnormal powerplant start procedures and limitations, including the use of an auxiliary power unit (APU) or external power source, if applicable.Explain the element, apply it to a scenario, and connect the answer to current references or aircraft information when relevant.
AA.II.B.K2Starting under various conditions.Explain the element, apply it to a scenario, and connect the answer to current references or aircraft information when relevant.
AA.II.B.K3Malfunctions during powerplant start, procedures to address the malfunction, and any associated limitations.Explain the element, apply it to a scenario, and connect the answer to current references or aircraft information when relevant.
AA.II.B.K4Coordinating and communicating with ground personnel for powerplant start, if applicable.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
AA.II.B.R1Malfunctions during powerplant start.Work through a scenario by identifying the hazard, evaluating the risk, and explaining a practical mitigation or decision.
AA.II.B.R2Propeller and turbine powerplant safety.Work through a scenario by identifying the hazard, evaluating the risk, and explaining a practical mitigation or decision.
AA.II.B.R3Managing situations where specific instructions or checklist items are not published.Work through a scenario by identifying the hazard, evaluating the risk, and explaining a practical mitigation or decision.
AA.II.B.R4Personnel, vehicles, vessels, foreign object debris, and other aircraft in the vicinity during powerplant start.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
AA.II.B.S1Ensure the ground safety procedures are followed during the before-start, start, and after-start phases.Describe the procedure, interpretation, or decision process that can be discussed during an oral. Physical aircraft performance remains part of the practical test.
AA.II.B.S2Use appropriate ground crew personnel during the start procedures (if applicable).Describe the procedure, interpretation, or decision process that can be discussed during an oral. Physical aircraft performance remains part of the practical test.
AA.II.B.S3Coordinate with crew, if applicable, and complete the appropriate checklist(s) prior to and after powerplant start.Describe the procedure, interpretation, or decision process that can be discussed during an oral. Physical aircraft performance remains part of the practical test.
AA.II.B.S4Respond appropriately to an abnormal start or malfunction.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.

Official task notes

  • See Appendix 3: Aircraft, Equipment, and Operational Requirements & Limitations for information related to this Task.

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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