AI.X.H — Secondary Stall Demonstration (ASEL, ASES)
AI.X.H for the Flight Instructor Airplane ACS: official objective, references, and 17 exact knowledge, risk-management, and skill descriptions.
FAA-S-ACS-25, 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 | Airplane |
| Area of operation | Area of Operation X. Slow flight, Stalls, and Spins |
| Task | Task H. Secondary Stall Demonstration (ASEL, ASES) |
| Task code prefix | AI.X.H |
| Official references | AC 61-67; FAA-H-8083-2, FAA-H-8083-3, FAA-H-8083-9, FAA-H-8083-25; POH/AFM |
| FAA document | FAA-S-ACS-25 — Flight Instructor for Airplane Category Airman Certification Standards |
| FAA source library | Open the official ACS library |
Official task objective
To determine the applicant understands secondary stalls, can apply that knowledge, manage associated risks, demonstrate appropriate skills, and provide effective instruction.
What the ACS code means
- AI identifies the ACS standard family used for this Flight Instructor Airplane document.
- X identifies Slow flight, Stalls, and Spins, the Area of Operation.
- H identifies Secondary Stall Demonstration (ASEL, ASES), 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 |
|---|---|---|
| AI.X.H.K1 | Aerodynamics of secondary stalls. | Explain the element, apply it to a scenario, and connect the answer to current references or aircraft information when relevant. |
| AI.X.H.K2 | Flight situations where secondary stalls may occur. | Explain the element, apply it to a scenario, and connect the answer to current references or aircraft information when relevant. |
| AI.X.H.K3 | Recognition of a secondary stall. | Explain the element, apply it to a scenario, and connect the answer to current references or aircraft information when relevant. |
| AI.X.H.K4 | Entry procedure and minimum entry altitude. | Explain the element, apply it to a scenario, and connect the answer to current references or aircraft information when relevant. |
| AI.X.H.K5 | Recovery procedure. | Explain the element, apply it to a scenario, and connect the answer to current references or aircraft information when relevant. |
| AI.X.H.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 |
|---|---|---|
| AI.X.H.R1 | Stall recovery procedure. | Work through a scenario by identifying the hazard, evaluating the risk, and explaining a practical mitigation or decision. |
| AI.X.H.R2 | Effect of environmental elements on airplane performance related to cross-controlled stalls (e.g., turbulence, microbursts, and high-density altitude). | Work through a scenario by identifying the hazard, evaluating the risk, and explaining a practical mitigation or decision. |
| AI.X.H.R3 | Collision hazards. | Work through a scenario by identifying the hazard, evaluating the risk, and explaining a practical mitigation or decision. |
| AI.X.H.R4 | Aircraft limitations. | Work through a scenario by identifying the hazard, evaluating the risk, and explaining a practical mitigation or decision. |
| AI.X.H.R5 | 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. |
Skills elements
| ACS code | Official description | How a mock oral can probe it |
|---|---|---|
| AI.X.H.S1 | 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. |
| AI.X.H.S2 | Select an entry altitude that allows the Task to be completed no lower than 3,000 feet above ground level (AGL). | Describe the procedure, interpretation, or decision process that can be discussed during an oral. Physical aircraft performance remains part of the practical test. |
| AI.X.H.S3 | Enter a stall in a specified configuration and exceed the critical angle of attach a second time during the recovery. | Describe the procedure, interpretation, or decision process that can be discussed during an oral. Physical aircraft performance remains part of the practical test. |
| AI.X.H.S4 | Recover promptly and appropriately after a secondary stall occurs. | Describe the procedure, interpretation, or decision process that can be discussed during an oral. Physical aircraft performance remains part of the practical test. |
| AI.X.H.S5 | Describe and demonstrate conditions that lead to a secondary stall for future avoidance. | Describe the procedure, interpretation, or decision process that can be discussed during an oral. Physical aircraft performance remains part of the practical test. |
| AI.X.H.S6 | 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.
Official task notes
- See Appendix 2: Safety of Flight and 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.
Related ACS tasks
- All Flight Instructor Airplane ACS tasks
85 task-level resources from FAA-S-ACS-25.
- AI.X.G — Elevator Trim Stall Demonstration (ASEL, ASES)
Area of Operation X. Slow flight, Stalls, and Spins
- AI.X.I — Spin Awareness and Spins
Area of Operation X. Slow flight, Stalls, and Spins
- AI.X.A — Maneuvering During Slow Flight
Area of Operation X. Slow flight, Stalls, and Spins
- AI.X.B — Demonstration of Flight Characteristics at Various Configurations and Airspeeds (ASEL and
Area of Operation X. Slow flight, Stalls, and Spins
- AI.X.C — Power-Off Stalls
Area of Operation X. Slow flight, Stalls, and Spins
- AI.X.D — Power-On Stalls
Area of Operation X. Slow flight, Stalls, and Spins