# PL.IX.C — Power-On Stalls — Private Pilot Powered Lift ACS

> PL.IX.C from FAA-S-ACS-13, including the official objective, references, notes, and 23 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 IX. Slow Flight and Stalls
- Task: Task C. Power-On Stalls
- Task code prefix: PL.IX.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 power-on stalls.

## Knowledge elements

- **PL.IX.C.K1** — Aerodynamics associated with stalls in various aircraft configurations, including the relationship between angle of attack, airspeed, load factor, power setting, aircraft weight and center of gravity, aircraft attitude, and yaw effects.
- **PL.IX.C.K2** — Stall characteristics as they relate to aircraft design, and recognition impending stall and full stall indications using sight, sound, or feel.
- **PL.IX.C.K3** — Factors and situations that can lead to a power-on stall and actions that can be taken to prevent it.
- **PL.IX.C.K4** — Fundamentals of stall recovery.

## Risk management elements

- **PL.IX.C.R1** — Factors and situations that could lead to an inadvertent power-on stall, spin, and loss of control.
- **PL.IX.C.R2** — Range and limitations of stall warning indicators (e.g., aircraft buffet, stall horn, etc.).
- **PL.IX.C.R3** — Pitch attitude limitations.
- **PL.IX.C.R4** — Stall warning(s) during normal operations.
- **PL.IX.C.R5** — Stall recovery procedure.
- **PL.IX.C.R6** — Secondary stalls and accelerated stalls.
- **PL.IX.C.R7** — Effect of environmental elements on aircraft performance related to power-on stalls (e.g., turbulence, microbursts, and high-density altitude).
- **PL.IX.C.R8** — Collision hazards.
- **PL.IX.C.R9** — Distractions, task prioritization, loss of situational awareness, or disorientation.

## Skills elements

- **PL.IX.C.S1** — Clear the area.
- **PL.IX.C.S2** — Select an entry altitude that allows the Task to be completed no lower than 3,000 feet AGL or as recommended by the manufacturer, whichever is higher.
- **PL.IX.C.S3** — Establish the takeoff, departure, or wing-borne configuration, as specified by the evaluator, and maintain coordinated flight throughout the maneuver.
- **PL.IX.C.S4** — Transition smoothly from the takeoff or departure attitude to the pitch attitude that would induce a stall.
- **PL.IX.C.S5** — Maintain a specified heading, ±10° if in straight flight; maintain a specified angle of bank not to exceed 20°, ±10° if in turning flight, while inducing the stall.
- **PL.IX.C.S6** — Acknowledge cues of the impending stall and then recover promptly after a full stall occurs.
- **PL.IX.C.S7** — Execute a stall recovery in accordance with procedures set forth in the Flight Manual.
- **PL.IX.C.S8** — Configure the aircraft as recommended by the manufacturer and accelerate to VX or VY.
- **PL.IX.C.S9** — Return to the altitude, heading, and airspeed specified by the evaluator.
- **PL.IX.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.