---
kind: "section"
citation: "14 C.F.R. § 29.305"
title: "14"
number: "29.305"
heading: "Strength and deformation."
url: "https://uscodex.org/cfr/14/29.305"
---

# §29.305. Strength and deformation.

- (a) The structure must be able to support limit loads without detrimental or permanent deformation. At any load up to limit loads, the deformation may not interfere with safe operation.
- (b) The structure must be able to support ultimate loads without failure. This must be shown by—
  - (1) Applying ultimate loads to the structure in a static test for at least three seconds; or
  - (2) **Dynamic tests simulating actual load application.**

## 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.