14 CFR § 35.36 - Bird impact.

---
identifier: "/us/cfr/t14/s35.36"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "14 CFR § 35.36 - Bird impact."
title_number: 14
title_name: "Aeronautics and Space"
section_number: "35.36"
section_name: "Bird impact."
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"
---


# 35.36 Bird impact.

The applicant must demonstrate, by tests or analysis based on tests or experience on similar designs, that the propeller can withstand the impact of a 4-pound bird at the critical location(s) and critical flight condition(s) of a typical installation without causing a major or hazardous propeller effect. This section does not apply to fixed-pitch wood propellers of conventional design.

[Amdt. 35-8, 73 FR 63348, Oct. 24, 2008]