---
title: "CS 25.854 Lavatory fire protection — CS-25 · Avioverse"
description: "(See AMC 25.854) For aeroplanes with a passenger capacity of 20 or more, or with a cabin length of 18.29 m (60 ft) or more:"
url: "https://avioverse.aero/regulations/easa/cs-25/subpart-d/cs-25-854"
---

# CS 25.854 Lavatory fire protection

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

IR Implementing rule

## CS 25.854 Lavatory fire protection

(See AMC 25.854)

For aeroplanes with a passenger capacity of 20 or more, or with a cabin length of 18.29 m (60 ft) or more:

(a) Each lavatory must be equipped with a smoke detector system or equivalent that provides a warning light in the cockpit, or provides a warning light or audible warning in the passenger cabin that would be readily detected by a cabin crew member; and

(b) Each lavatory must be equipped with a built-in fire extinguisher for each disposal receptacle for towels, paper, or waste, located within the lavatory. The extinguisher must be designed to discharge automatically into each disposal receptacle upon occurrence of a fire in that receptacle.

\[Amdt 25/19]

IR · CS 25.854 — CS-25 · ED Decision 2017/015/R · CS-25 Easy Access Rules · EAR revision 26 Jan 2023

AMC Acceptable means of compliance

## AMC 25.854 Lavatory Fire Protection

The cabin length should be measured parallel to the aeroplane centre line from the most forward to the most aft point accessible to passengers or crew.

However, points within in-flight accessible cargo compartments, approved as meeting one of the classifications of CS 25.857, do not need to be considered.

On the flight deck, the most forward seat reference point (SRP) of the pilots’ seats (with the seats adjusted to the most forward possible positions) should be used as the most forward point.

\[Amdt 25/19]

AMC · AMC 25.854 — CS-25 · ED Decision 2017/015/R · CS-25 Easy Access Rules · EAR revision 26 Jan 2023

[All rules in SUBPART D – DESIGN AND CONSTRUCTION](https://avioverse.aero/regulations/easa/cs-25/subpart-d)

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.