# CP.IX.F — Emergency Descent — Commercial Pilot Powered Lift ACS

> CP.IX.F from FAA-S-ACS-2, including the official objective, references, notes, and 16 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: Commercial Pilot for Powered-Lift Category Airman Certification Standards
- Identifier: FAA-S-ACS-2
- Published source date: November 2023
- Aircraft category: Powered Lift
- Certificate or rating: Commercial Pilot
- Area of Operation: Area of Operation IX. Emergency Operations
- Task: Task F. Emergency Descent
- Task code prefix: CP.IX.F
- 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 Commercial Pilot for Powered-Lift Category ACS (FAA-S-ACS-2) 49 Area of Operation IX. Emergency Operations emergency descent.

## Knowledge elements

- **CP.IX.F.K1** — Situations that would require an emergency descent (e.g., depressurization, smoke, or fire).
- **CP.IX.F.K2** — Immediate action items and emergency procedures.
- **CP.IX.F.K3** — Airspeed, including airspeed limitations.
- **CP.IX.F.K4** — Aircraft performance and limitations.

## Risk management elements

- **CP.IX.F.R1** — Altitude, wind, terrain, obstructions, gliding distance, and available landing distance considerations.
- **CP.IX.F.R2** — Collision hazards.
- **CP.IX.F.R3** — Flight control input(s) and aircraft configuration.
- **CP.IX.F.R4** — Distractions, task prioritization, loss of situational awareness, or disorientation.

## Skills elements

- **CP.IX.F.S1** — Clear the area.
- **CP.IX.F.S2** — Establish and maintain the appropriate airspeed and configuration appropriate to the scenario specified by the evaluator and as covered in the manufacturer's flight manual for the emergency descent.
- **CP.IX.F.S3** — Maintain orientation, divide attention appropriately, and plan and execute a smooth recovery.
- **CP.IX.F.S4** — Use bank angles between 30° and 45° to maintain positive load factors during the descent.
- **CP.IX.F.S5** — Maintain appropriate airspeed, +0/-10 knots, and level off at specified altitude, ±100 feet.
- **CP.IX.F.S6** — Make radio calls as appropriate.
- **CP.IX.F.S7** — Complete the appropriate checklist(s).
- **CP.IX.F.S8** — 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

- Note: See Appendix 2: Safety of Flight.

## 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.