---
kind: "section"
citation: "14 C.F.R. § 25.1324"
title: "14"
number: "25.1324"
heading: "Angle of attack system."
url: "https://uscodex.org/cfr/14/25.1324"
---

# §25.1324. Angle of attack system.


Each angle of attack system sensor must be heated or have an equivalent means of preventing malfunction in the heavy rain conditions defined in Table 1 of [§ 25.1323](/cfr/14/25.1323.md), the mixed phase and ice crystal conditions as defined in [part 33](/cfr/14/part33.md), Appendix D, of this chapter, the icing conditions defined in Appendix C of this part, and the following icing conditions specified in Appendix O of this part:

- (a) For airplanes certificated in accordance with [§ 25.1420(a)(1)](/cfr/14/25.1420.md?p=a-1), the icing conditions that the airplane is certified to safely exit following detection.
- (b) For airplanes certificated in accordance with [§ 25.1420(a)(2)](/cfr/14/25.1420.md?p=a-2), the icing conditions that the airplane is certified to safely operate in and the icing conditions that the airplane is certified to safely exit following detection.
- (c) For airplanes certificated in accordance with [§ 25.1420(a)(3)](/cfr/14/25.1420.md?p=a-3) and for airplanes not subject to [§ 25.1420](/cfr/14/25.1420.md), all icing conditions.

## Notes

### Amendments

[Amdt. 25-140, 79 FR 65527, Nov. 4, 2014]

### Authority

Authority: 49 U.S.C. 106(f), 106(g), 40113, 44701, 44702 and 44704; Pub. L. 115-254, 132 Stat 3281 (49 U.S.C. 44903 note).

### Source

Source: Docket No. 5066, 29 FR 18291, Dec. 24, 1964, unless otherwise noted.

### Amendments

[Amdt. 25-140, 79 FR 65527, Nov. 4, 2014]