CS 23.2145 Stability

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

IRImplementing rule

CS 23.2145Stability

(a)Aeroplanes not certified for aerobatics must:

(1)have static longitudinal, lateral, and directional stability in normal operations;

(2)have dynamic short period and Dutch roll stability in normal operations; and

(3)provide stable control feedback throughout the operating envelope.

(b)No aeroplane may exhibit any divergent longitudinal stability characteristic so unstable as to increase the pilot’s workload or otherwise endanger the aeroplane and its occupants.

IR · CS 23.2145 — CS-23 · ED Decision 2017/013/R · CS-23 Easy Access Rules · EAR revision 13 May 2026

AMCAcceptable means of compliance

AMC1 23.2145Stability

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ASTM F44 F3264 Standard Specification for Normal Category Aeroplanes Certification

5.10 Stability F3173/F3173M-21a Standard Specification for Aircraft Handling Characteristics [AMC & GM to CS-23: Issue 4] [AMC & GM to CS-23: Issue 5]

AMC · AMC1 23.2145 — CS-23 · ED Decision 2026/003/R · CS-23 Easy Access Rules · EAR revision 13 May 2026

AMCAcceptable means of compliance

AMC2 23.2145Stability

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CS-23 Amdt 4

23.171 Stability – General

23.173 Static longitudinal stability

23.175 Demonstration of static longitudinal stability

23.177 Static directional and lateral stability

23.181 Dynamic stability

AMC · AMC2 23.2145 — CS-23 · ED Decision 2017/025/R · CS-23 Easy Access Rules · EAR revision 13 May 2026

AMCAcceptable means of compliance

AMC3 23.2145Stability

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CS VLA Amdt 1 VLA.171 Stability – General VLA.173 Static longitudinal stability VLA.175 Demonstration of static longitudinal stability VLA.177 Static directional and lateral stability VLA.181 Dynamic stability

AMC · AMC3 23.2145 — CS-23 · ED Decision 2017/025/R · CS-23 Easy Access Rules · EAR revision 13 May 2026

All rules in SUBPART B — FLIGHT

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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