AA.I.C — Weather Information (ATP)
AA.I.C for the Airline Transport Pilot Airplane ACS: official objective, references, and 35 exact knowledge, risk-management, and skill descriptions.
FAA-S-ACS-11A, 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 | Airline Transport Pilot |
|---|---|
| Aircraft category | Airplane |
| Area of operation | Area of Operation I. Preflight Preparation |
| Task | Task C. Weather Information (ATP) |
| Task code prefix | AA.I.C |
| Official references | 14 CFR part 91; AC 61-107, AC 61-138, AC 91-74, AC 91-92; AIM; FAA-H-8083-2, FAA-H-8083-3, FAA-H-8083-16, FAA-H-8083-25, FAA-H-8083-28 |
| FAA document | FAA-S-ACS-11A — Airline Transport Pilot and Type Rating for Airplane Category Airman Certification Standards |
| FAA source library | Open the official ACS library |
Official task objective
To determine the applicant exhibits satisfactory knowledge, risk management, and skills associated with obtaining, understanding, and applying weather information for a flight under IFR.
What the ACS code means
- AA identifies the ACS standard family used for this Airline Transport Pilot Airplane document.
- I identifies Preflight Preparation, the Area of Operation.
- C identifies Weather Information (ATP), 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 |
|---|---|---|
| AA.I.C.K1 | Sources of weather data (e.g., National Weather Service, Flight Service) for flight planning purposes. | Explain the element, apply it to a scenario, and connect the answer to current references or aircraft information when relevant. |
| AA.I.C.K2 | Acceptable weather products and resources required for preflight planning, current and forecast weather for departure, en route, and arrival phases of flight such as: | Explain the element, apply it to a scenario, and connect the answer to current references or aircraft information when relevant. |
| AA.I.C.K2a | a. Airport Observations (METAR and SPECI) and Pilot Observations (PIREP) | Explain the element, apply it to a scenario, and connect the answer to current references or aircraft information when relevant. |
| AA.I.C.K2b | b. Surface Analysis Chart, Ceiling and Visibility Chart (CVA) | Explain the element, apply it to a scenario, and connect the answer to current references or aircraft information when relevant. |
| AA.I.C.K2c | c. Terminal Aerodrome Forecasts (TAF) | Explain the element, apply it to a scenario, and connect the answer to current references or aircraft information when relevant. |
| AA.I.C.K2d | d. Graphical Forecasts for Aviation (GFA) | Explain the element, apply it to a scenario, and connect the answer to current references or aircraft information when relevant. |
| AA.I.C.K2e | e. Wind and Temperature Aloft Forecast (FB) | Explain the element, apply it to a scenario, and connect the answer to current references or aircraft information when relevant. |
| AA.I.C.K2f | f. Convective Outlook (AC) | Explain the element, apply it to a scenario, and connect the answer to current references or aircraft information when relevant. |
| AA.I.C.K2g | g. Inflight Aviation Weather Advisories including Airmen's Meteorological Information (AIRMET), Significant Meteorological Information (SIGMET), and Convective SIGMET | Explain the element, apply it to a scenario, and connect the answer to current references or aircraft information when relevant. |
| AA.I.C.K3 | Meteorology applicable to the departure, en route, alternate, and destination for flights conducted under Instrument Flight Rules (IFR) to include expected climate and hazardous conditions such as: | Explain the element, apply it to a scenario, and connect the answer to current references or aircraft information when relevant. |
| AA.I.C.K3a | a. Atmospheric composition and stability | Explain the element, apply it to a scenario, and connect the answer to current references or aircraft information when relevant. |
| AA.I.C.K3b | b. Wind (e.g., windshear, mountain wave, factors affecting wind, etc.) | Explain the element, apply it to a scenario, and connect the answer to current references or aircraft information when relevant. |
| AA.I.C.K3c | c. Temperature and heat exchange | Explain the element, apply it to a scenario, and connect the answer to current references or aircraft information when relevant. |
| AA.I.C.K3d | d. Moisture/precipitation | Explain the element, apply it to a scenario, and connect the answer to current references or aircraft information when relevant. |
| AA.I.C.K3e | e. Weather system formation, including air masses and fronts | Explain the element, apply it to a scenario, and connect the answer to current references or aircraft information when relevant. |
| AA.I.C.K3f | f. Clouds | Explain the element, apply it to a scenario, and connect the answer to current references or aircraft information when relevant. |
| AA.I.C.K3g | g. Turbulence | Explain the element, apply it to a scenario, and connect the answer to current references or aircraft information when relevant. |
| AA.I.C.K3h | h. Thunderstorms and microbursts | Explain the element, apply it to a scenario, and connect the answer to current references or aircraft information when relevant. |
| AA.I.C.K3i | i. Icing and freezing level information | Explain the element, apply it to a scenario, and connect the answer to current references or aircraft information when relevant. |
| AA.I.C.K3j | j. Fog/mist | Explain the element, apply it to a scenario, and connect the answer to current references or aircraft information when relevant. |
| AA.I.C.K3k | k. Frost | Explain the element, apply it to a scenario, and connect the answer to current references or aircraft information when relevant. |
| AA.I.C.K3l | l. Obstructions to visibility (e.g., smoke, haze, volcanic ash, etc.) | Explain the element, apply it to a scenario, and connect the answer to current references or aircraft information when relevant. |
| AA.I.C.K4 | Flight deck displays of digital weather and aeronautical information, their use to navigate around weather, and equipment limitations. | Explain the element, apply it to a scenario, and connect the answer to current references or aircraft information when relevant. |
| AA.I.C.K5 | Low-visibility operations (e.g., surface movement, category II and III approaches). (ATP)(AMEL, AMES). | Explain the element, apply it to a scenario, and connect the answer to current references or aircraft information when relevant. |
| AA.I.C.K6 | Flight Risk Assessment Tools. | 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 |
|---|---|---|
| AA.I.C.R1 | Weather conditions involved in departure and in-flight decision making, to include: | Work through a scenario by identifying the hazard, evaluating the risk, and explaining a practical mitigation or decision. |
| AA.I.C.R1a | a. Circumstances requiring a change in course or destination | Work through a scenario by identifying the hazard, evaluating the risk, and explaining a practical mitigation or decision. |
| AA.I.C.R1b | b. Known or forecast icing, winds or turbulence aloft, volcanic ash, destination weather, etc. | Work through a scenario by identifying the hazard, evaluating the risk, and explaining a practical mitigation or decision. |
| AA.I.C.R1c | c. Personal weather minimums | Work through a scenario by identifying the hazard, evaluating the risk, and explaining a practical mitigation or decision. |
| AA.I.C.R1d | d. Operator specified or aircraft operational limitations, if applicable | Work through a scenario by identifying the hazard, evaluating the risk, and explaining a practical mitigation or decision. |
| AA.I.C.R2 | Use and limitations of: | Work through a scenario by identifying the hazard, evaluating the risk, and explaining a practical mitigation or decision. |
| AA.I.C.R2a | a. Installed onboard weather equipment | Work through a scenario by identifying the hazard, evaluating the risk, and explaining a practical mitigation or decision. |
| AA.I.C.R2b | b. Aviation weather reports and forecasts | Work through a scenario by identifying the hazard, evaluating the risk, and explaining a practical mitigation or decision. |
| AA.I.C.R2c | c. Inflight weather resources | 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 |
|---|---|---|
| AA.I.C.S1 | Interpret weather information, apply principles of aeronautical decision-making, and use a Flight Risk Assessment Tool, if available. | 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
- Note: If K2 is selected, the evaluator must assess the applicant’s knowledge of at least three sub-elements.
- Note: If K3 is selected, the evaluator must assess the applicant’s knowledge of at least three sub-elements.
- Note: See Appendix 1: Practical Test Roles, Responsibilities, and Outcomes 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 Airline Transport Pilot Airplane ACS tasks
48 task-level resources from FAA-S-ACS-11A.
- AA.I.B — Performance and Limitations
Area of Operation I. Preflight Preparation
- AA.I.D — High-Altitude Aerodynamics (ATP) (AMEL, AMES)
Area of Operation I. Preflight Preparation
- AA.I.A — Operation of Systems
Area of Operation I. Preflight Preparation
- AA.I.E — Air Carrier Operations (ATP) (AMEL, AMES)
Area of Operation I. Preflight Preparation