---
title: "CS 23.2245 Aeroelasticity — CS-23 · Avioverse"
description: "The aeroplane must be free from flutter, control reversal, and divergence:"
url: "https://avioverse.aero/regulations/easa/cs-23/subpart-c/cs-23-2245"
---

# CS 23.2245 Aeroelasticity

Normal-Category Aeroplanes (CS-23) · CS-23 · EAR revision 13 May 2026

IR Implementing rule

## CS 23.2245 Aeroelasticity

(a) The aeroplane must be free from flutter, control reversal, and divergence:

(1) at all speeds within and sufficiently beyond the structural design envelope;

(2) for any configuration and condition of operation;

(3) accounting for critical degrees of freedom; and

(4) accounting for any critical failures or malfunctions.

(b) The applicants’ design must account for tolerances for all quantities that affect flutter.

IR · CS 23.2245 — CS-23 · ED Decision 2017/013/R · CS-23 Easy Access Rules · EAR revision 13 May 2026

AMC Acceptable means of compliance

## AMC1 23.2245 Aeroelasticity

ASTM F44 F3264 Standard Specification for Normal Category Aeroplanes Certification

6.10 Aeroelasticity

F3061/F3061M-24a Standard Specification for Systems and Equipment in Small Aircraft F3093/F3093M-21 Standard Specification for Aeroelasticity Requirements

\[AMC & GM to CS-23: Issue 4]

\[AMC & GM to CS-23: Issue 5]

AMC · AMC1 23.2245 — CS-23 · ED Decision 2026/003/R · CS-23 Easy Access Rules · EAR revision 13 May 2026

AMC Acceptable means of compliance

## AMC2 23.2245 Aeroelasticity

CS-23 Amdt 4

23.629 Flutter

23.687 Spring devices

23.677(c) Trim systems

AMC · AMC2 23.2245 — CS-23 · ED Decision 2017/025/R · CS-23 Easy Access Rules · EAR revision 13 May 2026

AMC Acceptable means of compliance

## AMC3 23.2245 Aeroelasticity

CS VLA Amdt 1

VLA.629 Flutter

VLA.687 Spring devices

VLA.677 Trim systems

AMC · AMC3 23.2245 — CS-23 · ED Decision 2017/025/R · CS-23 Easy Access Rules · EAR revision 13 May 2026

[All rules in SUBPART C — STRUCTURES](https://avioverse.aero/regulations/easa/cs-23/subpart-c)

Consolidated from the EASA Easy Access Rules (revision 13 May 2026, extracted 13 Oct 2026) for convenience. Not the official publication — verify against the Official Journal of the European Union and the EASA publications before operational use.