AI.XIII.C — Demonstration of Effects of Various Airspeeds and Configurations during Engine Inoperative
AI.XIII.C for the Flight Instructor Airplane ACS: official objective, references, and 27 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 XIII. Multiengine Operations |
| Task | Task C. Demonstration of Effects of Various Airspeeds and Configurations during Engine Inoperative |
| Task code prefix | AI.XIII.C |
| Official references | FAA-H-8083-2, FAA-H-8083-3, FAA-H-8083-9, FAA-H-8083-25; FAA-P-8740-66; 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 the effects of various airspeeds and configurations during engine inoperative performance, 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.
- XIII identifies Multiengine Operations, the Area of Operation.
- C identifies Demonstration of Effects of Various Airspeeds and Configurations during Engine Inoperative, 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.XIII.C.K1 | Purpose for and elements of demonstration of effects of various airspeeds and configurations during engine inoperative performance. | Explain the element, apply it to a scenario, and connect the answer to current references or aircraft information when relevant. |
| AI.XIII.C.K2 | Selection of appropriate altitude for the demonstration. | Explain the element, apply it to a scenario, and connect the answer to current references or aircraft information when relevant. |
| AI.XIII.C.K3 | Proper entry procedure to include pitch attitude, bank attitude, and airspeed. | Explain the element, apply it to a scenario, and connect the answer to current references or aircraft information when relevant. |
| AI.XIII.C.K4 | Effects on performance of airspeed changes at, above, and below VYSE. | Explain the element, apply it to a scenario, and connect the answer to current references or aircraft information when relevant. |
| AI.XIII.C.K5 | Effects on performance of various configurations including: | Explain the element, apply it to a scenario, and connect the answer to current references or aircraft information when relevant. |
| AI.XIII.C.K5a | a. Landing gear extended | Explain the element, apply it to a scenario, and connect the answer to current references or aircraft information when relevant. |
| AI.XIII.C.K5b | b. Wing flaps extended | Explain the element, apply it to a scenario, and connect the answer to current references or aircraft information when relevant. |
| AI.XIII.C.K5c | c. Landing gear and wing flaps extended | Explain the element, apply it to a scenario, and connect the answer to current references or aircraft information when relevant. |
| AI.XIII.C.K5d | d. Windmilling propeller on the inoperative engine | Explain the element, apply it to a scenario, and connect the answer to current references or aircraft information when relevant. |
| AI.XIII.C.K6 | Airspeed control throughout the demonstration. | Explain the element, apply it to a scenario, and connect the answer to current references or aircraft information when relevant. |
| AI.XIII.C.K7 | Smooth control technique and coordination throughout the demonstration. | Explain the element, apply it to a scenario, and connect the answer to current references or aircraft information when relevant. |
| AI.XIII.C.K8 | 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.XIII.C.R1 | Altitude selection. | Work through a scenario by identifying the hazard, evaluating the risk, and explaining a practical mitigation or decision. |
| AI.XIII.C.R2 | Entry and recovery procedures. | Work through a scenario by identifying the hazard, evaluating the risk, and explaining a practical mitigation or decision. |
| AI.XIII.C.R3 | Loss of control or stall. | Work through a scenario by identifying the hazard, evaluating the risk, and explaining a practical mitigation or decision. |
| AI.XIII.C.R4 | Configuring the airplane. | Work through a scenario by identifying the hazard, evaluating the risk, and explaining a practical mitigation or decision. |
| AI.XIII.C.R5 | Collision hazards. | Work through a scenario by identifying the hazard, evaluating the risk, and explaining a practical mitigation or decision. |
| AI.XIII.C.R6 | 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.XIII.C.S1 | Demonstrate, describe, and explain effects of various airspeeds and configurations during engine inoperative performance. | Describe the procedure, interpretation, or decision process that can be discussed during an oral. Physical aircraft performance remains part of the practical test. |
| AI.XIII.C.S2 | Demonstrate smooth control inputs when transitioning between various airspeeds and configurations, which include: | Describe the procedure, interpretation, or decision process that can be discussed during an oral. Physical aircraft performance remains part of the practical test. |
| AI.XIII.C.S2a | a. Landing gear extended | Describe the procedure, interpretation, or decision process that can be discussed during an oral. Physical aircraft performance remains part of the practical test. |
| AI.XIII.C.S2b | b. Wing flaps extended | Describe the procedure, interpretation, or decision process that can be discussed during an oral. Physical aircraft performance remains part of the practical test. |
| AI.XIII.C.S2c | c. Landing gear and wing flaps extended | Describe the procedure, interpretation, or decision process that can be discussed during an oral. Physical aircraft performance remains part of the practical test. |
| AI.XIII.C.S2d | d. Windmilling propeller on the inoperative engine | Describe the procedure, interpretation, or decision process that can be discussed during an oral. Physical aircraft performance remains part of the practical test. |
| AI.XIII.C.S3 | Maintain appropriate airspeed, attitude, and altitude combinations for the various configurations. | Describe the procedure, interpretation, or decision process that can be discussed during an oral. Physical aircraft performance remains part of the practical test. |
| AI.XIII.C.S4 | Return to normal cruise flight at the altitude and heading specified 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. |
| AI.XIII.C.S5 | 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.XIII.B — VMC Demonstration (AMEL, AMES)
Area of Operation XIII. Multiengine Operations
- AI.XIV.A — After Landing, Parking, and Securing (ASEL, AMEL)
Area of Operation XIV. Postflight Procedures
- AI.XIII.A — Maneuvering with One Engine Inoperative (AMEL, AMES)
Area of Operation XIII. Multiengine Operations