# PL.XI.C — Inflight Powerplant(s) Failure and Restart in Multi-Powerplant Aircraft — Private Pilot Powered Lift ACS

> PL.XI.C from FAA-S-ACS-13, including the official objective, references, notes, and 21 exact knowledge, risk-management, and skill descriptions.

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

## Official Task context

- FAA document: Private Pilot for Powered-Lift Category Airman Certification Standards
- Identifier: FAA-S-ACS-13
- Published source date: November 2023
- Aircraft category: Powered Lift
- Certificate or rating: Private Pilot
- Area of Operation: Area of Operation XI. Emergency Operations
- Task: Task C. Inflight Powerplant(s) Failure and Restart in Multi-Powerplant Aircraft
- Task code prefix: PL.XI.C
- Official references: FAA-H-8083-2, FAA-H-8083-25; Flight Manual
- 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 an inflight powerplant(s) failure and restart, if applicable, in a multi-powerplant powered-lift aircraft.

## Knowledge elements

- **PL.XI.C.K1** — Flight characteristics and controllability associated with maneuvering the aircraft with powerplant(s) inoperative, including the importance of drag reduction and appropriate aircraft configuration.
- **PL.XI.C.K2** — Aircraft/powerplant limitations.
- **PL.XI.C.K3** — Powerplant restart procedures and conditions where a restart attempt is appropriate.
- **PL.XI.C.K4** — Causes of asymmetric thrust conditions and appropriate responses.

## Risk management elements

- **PL.XI.C.R1** — Potential powerplant(s) failure during flight.
- **PL.XI.C.R2** — Following checklist procedures for a powerplant(s) failure or a powerplant(s) restart.
- **PL.XI.C.R3** — Identifying the powerplant(s) that failed.
- **PL.XI.C.R4** — Collision hazards.
- **PL.XI.C.R5** — Aircraft configuration.
- **PL.XI.C.R6** — Factors and situations that could lead to loss of control with an inflight powerplant(s) failure.
- **PL.XI.C.R7** — Distractions, task prioritization, loss of situational awareness, or disorientation.

## Skills elements

- **PL.XI.C.S1** — Recognize and correctly identify powerplant(s) failure, complete memory items (if applicable), and maintain positive aircraft control.
- **PL.XI.C.S2** — Coordinate with crew, if applicable, and complete the appropriate emergency procedures and checklist(s) for powerplant shutdown.
- **PL.XI.C.S3** — Use flight controls and configure the aircraft in the proper combination as recommended by the manufacturer, or as required, to maintain best performance, and trim as required.
- **PL.XI.C.S4** — Determine the cause for the powerplant(s) failure and if a restart is a viable option.
- **PL.XI.C.S5** — Maintain the operating powerplant(s) within acceptable operating limits.
- **PL.XI.C.S6** — Maintain the airspeed ±10 knots, the specified heading ±10°, and altitude ±100 feet as specified by the evaluator and within the aircraft’s capability.
- **PL.XI.C.S7** — Consider a powerplant restart and, if appropriate, demonstrate the powerplant restart procedures in accordance with the manufacturer or operator specified procedures and checklists.
- **PL.XI.C.S8** — Select the nearest suitable airport or landing area.
- **PL.XI.C.S9** — Communicate with air traffic control (ATC) and the evaluator, as appropriate for the situation.
- **PL.XI.C.S10** — Use single-pilot resource management (SRM) or crew resource management (CRM), as appropriate.

## 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

- See Appendix 2: Safety of Flight and Appendix 3: Aircraft, Equipment, and Operational Requirements & Limitations for information related to this Task.

## 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.