14 CFR § 29.551 - Auxiliary lifting surfaces.

---
identifier: "/us/cfr/t14/s29.551"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "14 CFR § 29.551 - Auxiliary lifting surfaces."
title_number: 14
title_name: "Aeronautics and Space"
section_number: "29.551"
section_name: "Auxiliary lifting surfaces."
chapter_name: "FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION"
subchapter_number: "C"
subchapter_name: "AIRCRAFT"
part_number: "29"
part_name: "AIRWORTHINESS STANDARDS: TRANSPORT CATEGORY ROTORCRAFT"
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. 5084, 29 FR 16150, Dec. 3, 1964, unless otherwise noted."
cfr_part: "29"
---


# 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, and 29.351;

(b) the applicable ground loads in §§ 29.235, 29.471 through 29.485, 29.493, 29.505, and 29.521; and

(c) Any other critical condition expected in normal operation.