---
title: "I 25.7 Powerplant instruments — CS-25 · Avioverse"
description: "System Control and Monitoring. A means must be provided to indicate when the ATTCS system is in the armed or ready condition."
url: "https://avioverse.aero/regulations/easa/cs-25/appendices-to-cs-25/i-25-7-powerplant-instruments"
---

# I 25.7 Powerplant instruments

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)

IR Implementing rule

## I 25.7 Powerplant instruments

(a) System Control and Monitoring. A means must be provided to indicate when the ATTCS system is in the armed or ready condition.

(b) Engine Failure Warning. If the inherent flight characteristics of the aeroplane do not provide adequate warning that an engine has failed, a warning system which is independent of the ATTCS system must be provided to give the pilot a clear warning of engine failure during take-off.

IR — CS-25 · ED Decision 2003/2/RM · 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.