---
kind: "section"
citation: "14 C.F.R. § 25.371"
title: "14"
number: "25.371"
heading: "Gyroscopic loads."
url: "https://uscodex.org/cfr/14/25.371"
---

# §25.371. Gyroscopic loads.


The structure supporting any engine or auxiliary power unit must be designed for the loads, including gyroscopic loads, arising from the conditions specified in §§ [25.331](/cfr/14/25.331.md), [25.341](/cfr/14/25.341.md), [25.349](/cfr/14/25.349.md), [25.351](/cfr/14/25.351.md), [25.473](/cfr/14/25.473.md), [25.479](/cfr/14/25.479.md), and [25.481](/cfr/14/25.481.md), with the engine or auxiliary power unit at the maximum rotating speed appropriate to the condition. For the purposes of compliance with this paragraph, the pitch maneuver in [§ 25.331(c)(1)](/cfr/14/25.331.md?p=c-1) must be carried out until the positive limit maneuvering load factor (point A2 in [§ 25.333(b)](/cfr/14/25.333.md?p=b)) is reached.


## Notes

### Amendments

[Amdt. 25-141, 79 FR 73468, Dec. 11, 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. 25-141, 79 FR 73468, Dec. 11, 2014]