---
kind: "section"
citation: "14 C.F.R. § 25.943"
title: "14"
number: "25.943"
heading: "Negative acceleration."
url: "https://uscodex.org/cfr/14/25.943"
---

# §25.943. Negative acceleration.


No hazardous malfunction of an engine, an auxiliary power unit approved for use in flight, or any component or system associated with the powerplant or auxiliary power unit may occur when the airplane is operated at the negative accelerations within the flight envelopes prescribed in [§ 25.333](/cfr/14/25.333.md). This must be shown for the greatest duration expected for the acceleration.


## Notes

### Amendments

[Amdt. 25-40, 42 FR 15043, Mar. 17, 1977]

### 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. 25-40, 42 FR 15043, Mar. 17, 1977]