---
title: "CS 25.457 Wing-flaps — CS-25 · Avioverse"
description: "Wing flaps, their operating mechanisms, and their supporting structures must be designed for critical loads occurring in the conditions prescribed in CS…"
url: "https://avioverse.aero/regulations/easa/cs-25/subpart-c/cs-25-457"
---

# CS 25.457 Wing-flaps

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

IR Implementing rule

## CS 25.457 Wing-flaps

Wing flaps, their operating mechanisms, and their supporting structures must be designed for critical loads occurring in the conditions prescribed in CS 25.345, accounting for the loads occurring during transition from one wing-flap position and airspeed to another.

IR · CS 25.457 — 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.