IL.II.F — Performance and Limitations
IL.II.F for the Flight Instructor Powered Lift ACS: official objective, references, and 18 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 II. Technical Subject Areas |
| Task | Task F. Performance and Limitations |
| Task code prefix | IL.II.F |
| Official references | FAA-H-8083-1, 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 aircraft performance and limitations, 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.
- II identifies Technical Subject Areas, the Area of Operation.
- F identifies Performance and Limitations, 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.II.F.K1 | Elements related to performance and limitations by explaining the use of charts, tables, and data to determine performance. | Explain the element, apply it to a scenario, and connect the answer to current references or aircraft information when relevant. |
| IL.II.F.K2 | Factors affecting performance, including: | Explain the element, apply it to a scenario, and connect the answer to current references or aircraft information when relevant. |
| IL.II.F.K2a | a. Atmospheric conditions | Explain the element, apply it to a scenario, and connect the answer to current references or aircraft information when relevant. |
| IL.II.F.K2b | b. Pilot technique | Explain the element, apply it to a scenario, and connect the answer to current references or aircraft information when relevant. |
| IL.II.F.K2c | c. Aircraft configuration | Explain the element, apply it to a scenario, and connect the answer to current references or aircraft information when relevant. |
| IL.II.F.K2d | d. Airport, heliport, helipad, or unprepared surface environment | Explain the element, apply it to a scenario, and connect the answer to current references or aircraft information when relevant. |
| IL.II.F.K2e | e. Loading and weight and balance | Explain the element, apply it to a scenario, and connect the answer to current references or aircraft information when relevant. |
| IL.II.F.K3 | Weight and balance terms, including: basic empty weight, maximum gross weight, arm, moment, reference datum, center of gravity (CG) and CG limits, and useful load. | Explain the element, apply it to a scenario, and connect the answer to current references or aircraft information when relevant. |
| IL.II.F.K4 | Methods for computing CG. | Explain the element, apply it to a scenario, and connect the answer to current references or aircraft information when relevant. |
| IL.II.F.K5 | Height/Velocity (H/V) diagram according to the flight manual. | Explain the element, apply it to a scenario, and connect the answer to current references or aircraft information when relevant. |
| IL.II.F.K6 | Aerodynamics. | 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.II.F.R1 | Use of performance charts, tables, and data. | Work through a scenario by identifying the hazard, evaluating the risk, and explaining a practical mitigation or decision. |
| IL.II.F.R2 | Aircraft limitations. | Work through a scenario by identifying the hazard, evaluating the risk, and explaining a practical mitigation or decision. |
| IL.II.F.R3 | Possible differences between calculated performance and actual performance. | Work through a scenario by identifying the hazard, evaluating the risk, and explaining a practical mitigation or decision. |
| IL.II.F.R4 | Operations within “avoid areas” of the H/V diagram. | Work through a scenario by identifying the hazard, evaluating the risk, and explaining a practical mitigation or decision. |
| IL.II.F.R5 | Other hazards specific to the powered-lift make and model. | 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.II.F.S1 | Use of the appropriate manufacturer’s approved performance charts, tables, and data. | Describe the procedure, interpretation, or decision process that can be discussed during an oral. Physical aircraft performance remains part of the practical test. |
| IL.II.F.S2 | Compute the weight and balance, correct out-of-center of gravity loading errors and determine if the weight and balance remains within limits during all phases of flight and aircraft configurations. | 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.II.E — Flight Controls and Systems
Area of Operation II. Technical Subject Areas
- IL.II.G — National Airspace System
Area of Operation II. Technical Subject Areas
- IL.II.A — Human Factors
Area of Operation II. Technical Subject Areas
- IL.II.B — Visual Scanning and Collision Avoidance
Area of Operation II. Technical Subject Areas
- IL.II.C — Runway Incursion Avoidance
Area of Operation II. Technical Subject Areas
- IL.II.D — Principles of Flight
Area of Operation II. Technical Subject Areas