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United States Department of Transportation United States Department of Transportation

AC 25.629-1C - Aeroelastic Stability Substantiation of Transport Category Airplanes

Document Information

Number
25.629-1C
Title
Aeroelastic Stability Substantiation of Transport Category Airplanes
Status
Active
Date issued
2024-08-30
Office of Primary Responsibility
AIR-600, Policy and Innovation Division
Description

This AC provides guidance for acceptable means, but not the only means, of demonstrating compliance with 14 CFR 25.629, and other provisions of part 25 intended to preclude the aeroelastic instabilities of flutter, divergence, and control reversal. The details of all possible analytical procedures and testing techniques are beyond the scope of this AC. However, this AC includes general information for applicants to consider when demonstrating compliance with § 25.629 and related regulations. Revision C of this AC contains guidance based on rule changes to § 25.629. The contents of this document do not have the force and effect of law and are not meant to bind the public in any way. This document is intended only to provide clarity to the public regarding existing requirements under the law or agency policies.

Content
Cancels
Cancels
Number Title Date
25.629-1B Aeroelastic Stability Substantiation of Transport Category Airplanes

This advisory circular (AC) provides guidance material for acceptable means, but not the only means, of demonstrating compliance with the provisions of Title 14, Code of Federal Regulations part 25 associated with the design requirements for transport category airplanes to preclude the aeroelastic instabilities offlutter, divergence, and control reversal. The precise details for analytical procedures and testing techniques are beyond the scope of this AC.  However, some general information is included, with supporting discussions, for consideration when demonstrating compliance with§ 25.629 and related regulations. Revision B incorporates changes only to the portions of this AC affected by the Airplane and Engine Certification Requirements in Supercooled Large Drop, Mixed Phase, and Ice Crystal Icing Conditions final ru

 2014-10-27