IR.I.B.K3bFAA-S-ACS-8C · Nov 2023Knowledge
b. Wind (e.g., windshear, mountain wave, factors affecting wind, etc.)
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: b. Wind (e.g., windshear, mountain wave, factors affecting wind, etc.)
Bottom line
Turbulence, or a large variation in wind velocity over a short distance, can cause upset and LOC-I. Maintain awareness of conditions that can lead to various types of turbulence, such as clear air turbulence, mountain waves, wind shear, and thunderstorms or microbursts.
Key numbers
| Number | What it means |
|---|---|
| 30 knots or greater sustained surface winds | AIRMET Tango |
FAA references
- AFH ch. 5, Environmental Factors (p. 5-2) — FAA-H-8083-3C
- PHAK ch. 13 (p. 13-11) — FAA-H-8083-25C (2023)
- AC 91-92 Appendix A — AC No: 91-92
- AFH ch. 17 (pp. 17-7–17-8) — FAA-H-8083-3C
- RMH ch. 3 (p. 3-7) — FAA-H-8083-2A
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