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CS 23.2245 Aeroelasticity

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

IRImplementing rule

CS 23.2245Aeroelasticity

(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

AMCAcceptable means of compliance

AMC1 23.2245Aeroelasticity

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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

AMCAcceptable means of compliance

AMC2 23.2245Aeroelasticity

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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

AMCAcceptable means of compliance

AMC3 23.2245Aeroelasticity

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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

Consolidated from the EASA Easy Access Rules (revision 13 May 2026, extracted 17 Aug 2026) for convenience. Not the official publication — verify against the Official Journal of the European Union and the EASA publications before operational use.

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