---
title: "CS 25.459 Special devices — CS-25 · Avioverse"
description: "The loading for special devices using aero-dynamic surfaces (such as slots, slats and spoilers) must be determined from test data."
url: "https://avioverse.aero/regulations/easa/cs-25/subpart-c/cs-25-459"
---

# CS 25.459 Special devices

Large Aeroplanes (CS-25) · CS-25 · EAR revision 26 Jan 2023

IR Implementing rule

## CS 25.459 Special devices

The loading for special devices using aero-dynamic surfaces (such as slots, slats and spoilers) must be determined from test data.

IR · CS 25.459 — CS-25 · ED Decision 2003/2/RM · CS-25 Easy Access Rules · EAR revision 26 Jan 2023

[All rules in SUBPART C – STRUCTURE](https://avioverse.aero/regulations/easa/cs-25/subpart-c)

Consolidated from the EASA Easy Access Rules (revision 26 Jan 2023, 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.