IL.X.A — Rapid Deceleration/Quick Stop
IL.X.A for the Flight Instructor Powered Lift ACS: official objective, references, and 22 exact knowledge, risk-management, and skill descriptions.
FAA-S-ACS-27, November 2023. This study page does not replace the current FAA publication or an examiner's plan of action.
Official task context
| Certificate or rating | Flight Instructor |
|---|---|
| Aircraft category | Powered Lift |
| Area of operation | Area of Operation X. Performance Maneuvers |
| Task | Task A. Rapid Deceleration/Quick Stop |
| Task code prefix | IL.X.A |
| Official references | FAA-H-8083-2, FAA-H-8083-9, FAA-H-8083-25; Flight Manual |
| FAA document | FAA-S-ACS-27 — Flight Instructor for Powered-Lift Category Airman Certification Standards |
| FAA source library | Open the official ACS library |
Official task objective
To determine the applicant understands rapid deceleration/quick stop, can apply that knowledge, manage associated risks, demonstrate appropriate skills, and provide effective instruction.
What the ACS code means
- IL identifies the ACS standard family used for this Flight Instructor Powered Lift document.
- X identifies Performance Maneuvers, the Area of Operation.
- A identifies Rapid Deceleration/Quick Stop, 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
| ACS code | Official description | How a mock oral can probe it |
|---|---|---|
| IL.X.A.K1 | Purpose of the maneuver. | Explain the element, apply it to a scenario, and connect the answer to current references or aircraft information when relevant. |
| IL.X.A.K2 | Aircraft transmission and powerplant limitations. | Explain the element, apply it to a scenario, and connect the answer to current references or aircraft information when relevant. |
| IL.X.A.K3 | Airspeed limitations. | Explain the element, apply it to a scenario, and connect the answer to current references or aircraft information when relevant. |
| IL.X.A.K4 | Aircraft maximum rate deceleration rate and technique. | Explain the element, apply it to a scenario, and connect the answer to current references or aircraft information when relevant. |
| IL.X.A.K5 | Height velocity (H/V) awareness. | Explain the element, apply it to a scenario, and connect the answer to current references or aircraft information when relevant. |
| IL.X.A.K6 | Common errors related to this Task. | Explain the element, apply it to a scenario, and connect the answer to current references or aircraft information when relevant. |
Risk management elements
| ACS code | Official description | How a mock oral can probe it |
|---|---|---|
| IL.X.A.R1 | Gaining or losing altitude. | Work through a scenario by identifying the hazard, evaluating the risk, and explaining a practical mitigation or decision. |
| IL.X.A.R2 | Excessive pitch attitudes. | Work through a scenario by identifying the hazard, evaluating the risk, and explaining a practical mitigation or decision. |
| IL.X.A.R3 | Effects of wind. | Work through a scenario by identifying the hazard, evaluating the risk, and explaining a practical mitigation or decision. |
| IL.X.A.R4 | Airframe and airspeed limitations. | Work through a scenario by identifying the hazard, evaluating the risk, and explaining a practical mitigation or decision. |
| IL.X.A.R5 | Collision hazards. | Work through a scenario by identifying the hazard, evaluating the risk, and explaining a practical mitigation or decision. |
| IL.X.A.R6 | Dividing attention between aircraft control and orientation. | Work through a scenario by identifying the hazard, evaluating the risk, and explaining a practical mitigation or decision. |
| IL.X.A.R7 | Distractions, task prioritization, loss of situational awareness, or disorientation. | Work through a scenario by identifying the hazard, evaluating the risk, and explaining a practical mitigation or decision. |
| IL.X.A.R8 | Uncoordinated flight. | Work through a scenario by identifying the hazard, evaluating the risk, and explaining a practical mitigation or decision. |
| IL.X.A.R9 | Vortex ring state (VRS). | Work through a scenario by identifying the hazard, evaluating the risk, and explaining a practical mitigation or decision. |
Skills elements
| ACS code | Official description | How a mock oral can probe it |
|---|---|---|
| IL.X.A.S1 | Complete 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. |
| IL.X.A.S2 | Clear the area. | Describe the procedure, interpretation, or decision process that can be discussed during an oral. Physical aircraft performance remains part of the practical test. |
| IL.X.A.S3 | Maintain heading throughout the maneuver, ±5°. | Describe the procedure, interpretation, or decision process that can be discussed during an oral. Physical aircraft performance remains part of the practical test. |
| IL.X.A.S4 | Perform a maximum performance deceleration as directed by the evaluator. | Describe the procedure, interpretation, or decision process that can be discussed during an oral. Physical aircraft performance remains part of the practical test. |
| IL.X.A.S5 | Select an appropriate power setting and thrust vector to allow deceleration at maximum rate. | Describe the procedure, interpretation, or decision process that can be discussed during an oral. Physical aircraft performance remains part of the practical test. |
| IL.X.A.S6 | Maintain coordinated flight throughout the maneuver. | Describe the procedure, interpretation, or decision process that can be discussed during an oral. Physical aircraft performance remains part of the practical test. |
| IL.X.A.S7 | Analyze and correct common errors related to this Task. | 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.
Related ACS tasks
- All Flight Instructor Powered Lift ACS tasks
73 task-level resources from FAA-S-ACS-27.
- IL.IX.D — Straight Descents and Descending Turns
Area of Operation IX. Fundamentals of Flight
- IL.X.B — Inflight Conversion During Straight-and-Level Flight
Area of Operation X. Performance Maneuvers
- IL.X.C — Steep Turns
Area of Operation X. Performance Maneuvers