AA.I.C.R1bFAA-S-ACS-11A · Nov 2023Risk management
b. Known or forecast icing, winds or turbulence aloft, volcanic ash, destination weathe...
Weather conditions involved in departure and in-flight decision making, to include: b. Known or forecast icing, winds or turbulence aloft, volcanic ash, destination weather, etc.
Bottom line
Flight into known icing conditions is prohibited for all aircraft not properly certificated for flight in icing conditions or not properly equipped with ice protection equipment. Severe turbulence aloft, although not common, can result in loss of control and may lead to aircraft structural failure. Pilot Weather Reports (PIREP) are one of the best methods of receiving timely and accurate reports on icing and turbulence at high altitudes. e.
FAA references
- AC 91-92, paras. 4.17, 7.4.1.1, 7.4.1.2, 8.2 — AC No: 91-92
- AWH ch. 3 (p. 3-3) — FAA-H-8083-28A
- AC 91-92 Appendix A — AC No: 91-92
- 14 CFR 91.527 (Operating in icing conditions.) — eCFR current as of 2026-03-05
- AFH ch. 13 (p. 13-9) — FAA-H-8083-3C
- RMH ch. 5 (p. 5-2) — FAA-H-8083-2A
- AC 91-74, para. 5-8 — AC No: 91-74A
- AFH ch. 5, Environmental Factors (p. 5-2) — FAA-H-8083-3C
- RMH ch. 3 (p. 3-7) — FAA-H-8083-2A
- AC 61-107, para. 2-5, 2-6 — AC No: 61-107B
- 14 CFR 91.151 (Fuel requirements for flight in VFR conditions.) — eCFR current as of 2026-03-05
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