---
title: "AMC to Appendix S, S25.20(b) Exit as effective as a Type IV exit — CS-25 · Avioverse"
description: "An acceptable means of compliance with the requirement that the remaining exit resulting from an obstruction shall be as effective as a Type IV emergency…"
url: "https://avioverse.aero/regulations/easa/cs-25/appendices-to-cs-25/amc-to-appendix-s-s25-20-b-exit-as-effective-as-a-type-iv-exit"
---

# AMC to Appendix S, S25.20(b) Exit as effective as a Type IV exit

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

Official sources: [EASA Easy Access Rules (opens in a new tab)](https://www.easa.europa.eu/en/document-library/easy-access-rules/easy-access-rules-large-aeroplanes-cs-25)

AMC Acceptable means of compliance

## AMC to Appendix S, S25.20(b) Exit as effective as a Type IV exit

An acceptable means of compliance with the requirement that the remaining exit resulting from an obstruction shall be as effective as a Type IV emergency exit (S25.20(b)(1) and (b)(2)), is to demonstrate that:

(1) the dimensions of the remaining exit opening are equivalent to or greater than those of a Type IV emergency exit; and

(2) the obstructing item does not protrude into the horizontally projected opening of the remaining exit.

In the assessment of the effectiveness of the remaining exit, the requirements of CS 25.807(a)(4), CS 25.809(b) and CS 25.813(c)(1) should also be considered.

\[Amdt 25/19]

AMC — CS-25 · ED Decision 2017/015/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 2 Nov 2026) for convenience. Not the official publication — verify against the Official Journal of the European Union and the EASA publications before operational use.