---
title: "CS 23.2145 Stability — CS-23 · Avioverse"
description: "Aeroplanes not certified for aerobatics must: have static longitudinal, lateral, and directional stability in normal operations;"
url: "https://avioverse.aero/regulations/easa/cs-23/subpart-b/cs-23-2145"
---

# CS 23.2145 Stability

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

IR Implementing rule

## CS 23.2145 Stability

(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

AMC Acceptable means of compliance

## AMC1 23.2145 Stability

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

AMC Acceptable means of compliance

## AMC2 23.2145 Stability

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

AMC Acceptable means of compliance

## AMC3 23.2145 Stability

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](https://avioverse.aero/regulations/easa/cs-23/subpart-b)

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.