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IR.I.B.R1cFAA-S-ACS-8C · Nov 2023Risk management

c. Hazardous weather conditions, including known or forecast icing or turbulence aloft

ACS element text (the applicant demonstrates understanding of)

Making the go/no-go and continue/divert decisions, including: c. Hazardous weather conditions, including known or forecast icing or turbulence aloft

Bottom line

Icing–Icing conditions constitute a hazard, and in-flight ice accretion has resulted in numerous loss of control accidents. Turbulence and Winds–Severe turbulence aloft, although not common, can result in loss of control and may lead to aircraft structural failure.

FAA references

  1. AWH ch. 3 (p. 3-3) — FAA-H-8083-28A
  2. PHAK ch. 13 (p. 13-11) — FAA-H-8083-25C (2023)
  3. PHAK ch. 13 (p. 13-12) — FAA-H-8083-25C (2023)
  4. AC 91-92, paras. 4.13, 4.17, 7.4.1.1, 7.4.1.2 — AC No: 91-92
  5. AC 91-92 Appendix A — AC No: 91-92
  6. 14 CFR 91.527 (Operating in icing conditions.) — eCFR current as of 2026-03-05
  7. AFH ch. 13 (pp. 13-9–13-10) — FAA-H-8083-3C
  8. RMH ch. 5 (p. 5-2) — FAA-H-8083-2A
  9. RMH ch. 3 (p. 3-7) — FAA-H-8083-2A
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