14 CFR § 35.43 - Propeller hydraulic components.

---
identifier: "/us/cfr/t14/s35.43"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "14 CFR § 35.43 - Propeller hydraulic components."
title_number: 14
title_name: "Aeronautics and Space"
section_number: "35.43"
section_name: "Propeller hydraulic components."
chapter_name: "FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION"
subchapter_number: "C"
subchapter_name: "AIRCRAFT"
part_number: "35"
part_name: "AIRWORTHINESS STANDARDS: PROPELLERS"
positive_law: false
currency: "2026-04-05"
last_updated: "2026-04-05"
format_version: "1.1.0"
generator: "[email protected]"
authority: "49 U.S.C. 106(f), 106(g), 40113, 44701-44702, 44704."
regulatory_source: "Docket No. 2095, 29 FR 7458, June 10, 1964, unless otherwise noted."
cfr_part: "35"
---


# 35.43 Propeller hydraulic components.

Applicants must show by test, validated analysis, or both, that propeller components that contain hydraulic pressure and whose structural failure or leakage from a structural failure could cause a hazardous propeller effect demonstrate structural integrity by:

(a) A proof pressure test to 1.5 times the maximum operating pressure for one minute without permanent deformation or leakage that would prevent performance of the intended function.

(b) A burst pressure test to 2.0 times the maximum operating pressure for one minute without failure. Leakage is permitted and seals may be excluded from the test.

[Amdt. 35-8, 73 FR 63349, Oct. 24, 2008]