---
title: "CS 23.2205 Interaction of systems and structures — CS-23 · Avioverse"
description: "For aeroplanes equipped with systems that affect structural performance, either directly or as a result of failure or malfunction, the applicant must…"
url: "https://avioverse.aero/regulations/easa/cs-23/subpart-c/cs-23-2205"
---

# CS 23.2205 Interaction of systems and structures

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

IR Implementing rule

## CS 23.2205 Interaction of systems and structures

For aeroplanes equipped with systems that affect structural performance, either directly or as a result of failure or malfunction, the applicant must account for the influence and failure conditions of these systems when showing compliance with the requirements of this Subpart.

IR · CS 23.2205 — CS-23 · ED Decision 2017/013/R · CS-23 Easy Access Rules · EAR revision 13 May 2026

AMC Acceptable means of compliance

## AMC1 23.2205 Interaction of systems and structures

ASTM F44 F3264 Standard Specification for Normal Category Aeroplanes Certification

6.2 Interaction of Systems and Structure

Remarks

F3254-22 Standard Specification for Aircraft Interaction of Systems and Structures To demonstrate compliance with 23.2205, the following of F3254-22 should be adjusted.

Chapter 4 - Interaction of System and Structure:

Modifications are required in Figures 2, 3 and 4:

Replace the probability label ‘remote’ with ‘’

Replace the label ‘Extremely Improbable’ as follows:

for Level 1, 2 and 3 aeroplanes, use ’ for Level 4 aeroplanes, use ‘’

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

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

AMC · AMC1 23.2205 — CS-23 · ED Decision 2026/003/R · CS-23 Easy Access Rules · EAR revision 13 May 2026

AMC Acceptable means of compliance

## AMC2 23.2205 Interaction of systems and structures

None

Remarks

Provision not included in CS 23 Amdt 4

AMC · AMC2 23.2205 — CS-23 · ED Decision 2017/025/R · CS-23 Easy Access Rules · EAR revision 13 May 2026

AMC Acceptable means of compliance

## AMC3 23.2205 Interaction of systems and structures

None

Remarks

Provision not included in CS VLA Amdt 1

AMC · AMC3 23.2205 — 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.