IR.II.A.K1FAA-S-ACS-8C · Nov 2023Knowledge
The general operational characteristics and limitations of applicable anti-icing and de...
The general operational characteristics and limitations of applicable anti-icing and deicing systems, including airframe, propeller, intake, fuel, and pitot-static systems.
Bottom line
The presence of anti-icing and deicing equipment, even though it may appear elaborate and complete, does not necessarily mean that the airplane is approved for flight in icing conditions. Anti-icing and deicing equipment are not intended to sustain long-term flight in icing conditions.
Key numbers
| Number | What it means |
|---|---|
| Most light aircraft have only a heated pitot tube and are not certified for flight in icing. | Light aircraft |
| Deicing equipment is generally limited to pneumatic boots on wing and tail leading edges. | Deice boots |
| The propeller boot is divided into two sections, the inboard and the outboard sections. | Prop sections |
FAA references
- PHAK ch. 7 (p. 7-40) — FAA-H-8083-25C (2023)
- AFH ch. 13 (pp. 13-9–13-10) — FAA-H-8083-3C
- PHAK ch. 7 (p. 7-41) — FAA-H-8083-25C (2023)
- IFH ch. 4 (pp. 4-16–4-17) — FAA-H-8083-15B
- 14 CFR 91.527 (Operating in icing conditions.) — eCFR current as of 2026-03-05
- AC 91-74 Appendix 3 — AC No: 91-74A
- IFH ch. 5 (p. 5-37) — FAA-H-8083-15B
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