---
kind: "section"
citation: "14 C.F.R. § 29.303"
title: "14"
number: "29.303"
heading: "Factor of safety."
url: "https://uscodex.org/cfr/14/29.303"
---

# §29.303. Factor of safety.


Unless otherwise provided, a factor of safety of 1.5 must be used. This factor applies to external and inertia loads unless its application to the resulting internal stresses is more conservative.


## Notes

### Authority

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

### Source

Source: Docket No. 5084, 29 FR 16150, Dec. 3, 1964, unless otherwise noted.