---
title: "CS 23.2255 Protection of structure — CS-23 · Avioverse"
description: "Each part of the aeroplane, including small parts such as fasteners, must be protected against deterioration or loss of strength due to any cause likely…"
url: "https://avioverse.aero/regulations/easa/cs-23/subpart-c/cs-23-2255"
---

# CS 23.2255 Protection of structure

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

IR Implementing rule

## CS 23.2255 Protection of structure

(a) Each part of the aeroplane, including small parts such as fasteners, must be protected against deterioration or loss of strength due to any cause likely to occur in the expected operational environment.

(b) Each part of the aeroplane must have adequate provisions for ventilation and drainage.

(c) For each part that requires maintenance, preventive maintenance, or servicing, the applicant must incorporate a means into the aeroplane design to allow such actions to be accomplished.

IR · CS 23.2255 — CS-23 · ED Decision 2017/013/R · CS-23 Easy Access Rules · EAR revision 13 May 2026

AMC Acceptable means of compliance

## AMC1 23.2255 Protection of structure

ASTM F44 F3264 Standard Specification for Normal Category Aeroplanes Certification

6.12 Protection of Structure

F3061/F3061M-24a Standard Specification for Systems and Equipment in Small Aircraft F3232/F3232M-25 Standard Specification for Flight Controls in Small Aircraft

F3114-21 Standard Specification for Structures

F3380-19 Standard Practice for Structural Compliance of Very Light Aeroplanes

F3066/F3066M-18 Standard Specification for Aircraft Powerplant Installation Hazard Mitigation F3408/F3408M-21 Standard Specification for Aircraft Emergency Parachute Recovery Systems \[AMC & GM to CS-23: Issue 4]

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

AMC · AMC1 23.2255 — CS-23 · ED Decision 2026/003/R · CS-23 Easy Access Rules · EAR revision 13 May 2026

AMC Acceptable means of compliance

## AMC2 23.2255 Protection of structure

CS-23 Amdt 4

23.607 Fasteners

23.609 Protection of Structure

23.611 Accessibility

23.689(a)(3) Cable systems

AMC · AMC2 23.2255 — CS-23 · ED Decision 2017/025/R · CS-23 Easy Access Rules · EAR revision 13 May 2026

AMC Acceptable means of compliance

## AMC3 23.2255 Protection of structure

CS VLA Amdt 1

VLA.607 Self-locking nuts

VLA.609 Protection of Structure

VLA.611 Accessibility

VLA.689 Cable systems

AMC · AMC3 23.2255 — 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.