---
title: "CS 25.1015 Oil tank tests — CS-25 · Avioverse"
description: "Each oil tank must be designed and installed so that – (a) It can withstand, without failure, each vibration, inertia, and fluid load that it may be…"
url: "https://avioverse.aero/regulations/easa/cs-25/subpart-e/cs-25-1015"
---

# CS 25.1015 Oil tank tests

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

IR Implementing rule

## CS 25.1015 Oil tank tests

Each oil tank must be designed and installed so that –

(a) It can withstand, without failure, each vibration, inertia, and fluid load that it may be subjected to in operation; and

(b) It meets the provisions of CS 25.965, except –

(1) The test pressure –

(i) For pressurised tanks used with a turbine engine, may not be less than 34 kPa (5 psi) plus the maximum operating pressure of the tank instead of the pressure specified in CS 25.965(a); and

(ii) For all other tanks, may not be less than 34 kPa (5 psi) instead of the pressure specified in CS 25.965(a); and

(2) The test fluid must be oil at 121°C (250°F) instead of the fluid specified in CS 25.965(c).

IR · CS 25.1015 — 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.