---
kind: "section"
citation: "14 C.F.R. § 35.22"
title: "14"
number: "35.22"
heading: "Feathering propellers."
url: "https://uscodex.org/cfr/14/35.22"
---

# §35.22. Feathering propellers.

- (a) Feathering propellers are intended to feather from all flight conditions, taking into account expected wear and leakage. Any feathering and unfeathering limitations must be documented in the appropriate manuals.
- (b) Propeller pitch control systems that use engine oil to feather must incorporate a method to allow the propeller to feather if the engine oil system fails.
- (c) Feathering propellers must be designed to be capable of unfeathering after the propeller system has stabilized to the minimum declared outside air temperature.

## Notes

### Amendments

[Amdt. 35-8, 73 FR 63347, Oct. 24, 2008]

### Authority

Authority: 49 U.S.C. 106(f), 106(g), 40113, 44701-44702, 44704.

### Source

Source: Docket No. 2095, 29 FR 7458, June 10, 1964, unless otherwise noted.

### Amendments

[Amdt. 35-8, 73 FR 63347, Oct. 24, 2008]