---
kind: "section"
citation: "14 C.F.R. § 29.551"
title: "14"
number: "29.551"
heading: "Auxiliary lifting surfaces."
url: "https://uscodex.org/cfr/14/29.551"
---

# §29.551. Auxiliary lifting surfaces.


Each auxiliary lifting surface must be designed to withstand—

- (a) The critical flight loads in §§ [29.337 through 29.341](/cfr/14/29.337..29.341.md), and [29.351](/cfr/14/29.351.md);
- (b) the applicable ground loads in §§ [29.235](/cfr/14/29.235.md), [29.471 through 29.485](/cfr/14/29.471..29.485.md), [29.493](/cfr/14/29.493.md), [29.505](/cfr/14/29.505.md), and [29.521](/cfr/14/29.521.md); and
- (c) **Any other critical condition expected in normal operation.**

## 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.