FlyCurrentFLYCURRENT
AA.I.C.K3bFAA-S-ACS-11A · Nov 2023Knowledge

b. Wind (e.g., windshear, mountain wave, factors affecting wind, etc.)

ACS element text (the applicant demonstrates understanding of)

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

Wind shear, mountain waves, and clear air turbulence are conditions that can lead to turbulence, which can cause upset and loss of control in flight. The AIRMET Tango bulletin covers turbulence, strong surface winds, and low-level wind shear.

Key numbers

Key numbers for b. Wind (e.g., windshear, mountain wave, factors affecting wind, etc.)
NumberWhat it means
30 knots or greater, sustained surface winds, forecast in an AIRMETAIRMET surface wind

FAA references

  1. AFH ch. 5, Environmental Factors (p. 5-2) — FAA-H-8083-3C
  2. PHAK ch. 13 (p. 13-11) — FAA-H-8083-25C (2023)
  3. AC 91-92 Appendix A — AC No: 91-92
  4. AWH App. D (p. D-10) — FAA-H-8083-28A
  5. RMH ch. 3 (p. 3-7) — FAA-H-8083-2A
  6. AC 91-92, para. 7.6 — AC No: 91-92
Members lesson

Build understanding you can use

Unlock the full lesson and continue studying this element.

  • Full teaching sections: What it is; Key points; Rules and numbers; How it is done
  • Check your understanding with answers you can reveal
  • Common mistakes paired with the FAA facts that correct them
View membership options