---
title: "CS 25.1025 Oil valves — CS-25 · Avioverse"
description: "Each oil shut-off must meet the requirements of CS 25.1189. The closing of oil shut-off means may not prevent propeller feathering."
url: "https://avioverse.aero/regulations/easa/cs-25/subpart-e/cs-25-1025"
---

# CS 25.1025 Oil valves

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

IR Implementing rule

## CS 25.1025 Oil valves

(a) Each oil shut-off must meet the requirements of CS 25.1189.

(b) The closing of oil shut-off means may not prevent propeller feathering.

(c) Each oil valve must have positive stops or suitable index provisions in the ‘on’ and ‘off’ positions and must be supported so that no loads resulting from its operation or from accelerated flight conditions are transmitted to the lines attached to the valve.

IR · CS 25.1025 — CS-25 · ED Decision 2003/2/RM · CS-25 Easy Access Rules · EAR revision 26 Jan 2023

[All rules in SUBPART E – POWERPLANT](https://avioverse.aero/regulations/easa/cs-25/subpart-e)

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.