---
title: "AMC to Appendix H, H25.4(a)(3) Mandatory replacement time of EWIS components as defined in CS 25.1701 — CS-25 · Avioverse"
description: "In accordance with subparagraph H25.4(a)(3) applicants are required to include in the Airworthiness Limitations section of the Instructions for Continued…"
url: "https://avioverse.aero/regulations/easa/cs-25/appendices-to-cs-25/amc-to-appendix-h-h25-4-a-3-mandatory-replacement-time-of-ewis-components-as"
---

# AMC to Appendix H, H25.4(a)(3) Mandatory replacement time of EWIS components as defined in CS 25.1701

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

AMC Acceptable means of compliance

## AMC to Appendix H, H25.4(a)(3) Mandatory replacement time of EWIS components as defined in CS 25.1701

In accordance with subparagraph H25.4(a)(3) applicants are required to include in the Airworthiness Limitations section of the Instructions for Continued Airworthiness any mandatory replacement times for EWIS components. EWIS components are those defined by CS 25.1701. Generally, EWIS components are designed and selected to last for the service life of the aeroplane. Any EWIS component that must be replaced at regular intervals to maintain the airworthiness of the associated system or aeroplane must be specified, with its required replacement interval, in the Airworthiness Limitations section of the ICA.

\[Amdt 25/5]

AMC — CS-25 · ED Decision 2008/006/R · CS-25 Easy Access Rules · EAR revision 26 Jan 2023

[All rules in APPENDICES TO CS-25](https://avioverse.aero/regulations/easa/cs-25/appendices-to-cs-25)

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.