---
kind: "section"
citation: "14 C.F.R. § 125.177"
title: "14"
number: "125.177"
heading: "Control of engine rotation."
url: "https://uscodex.org/cfr/14/125.177"
---

# §125.177. Control of engine rotation.

- (a) Except as provided in [paragraph (b)](#b) of this section, each airplane must have a means of individually stopping and restarting the rotation of any engine in flight.
- (b) In the case of turbine engine installations, a means of stopping rotation need be provided only if the Administrator finds that rotation could jeopardize the safety of the airplane.

## Notes

### Authority

Authority: 49 U.S.C. 106(f), 106(g), 40113, 44701-44702, 44705, 44710-44711, 44713, 44716-44717, 44722.

### Source

Source: Docket 19779, 45 FR 67235, Oct. 9, 1980, unless otherwise noted.