---
title: "CS-E 70 Materials and Manufacturing Methods — CS-E · Avioverse"
description: "(See AMC E 70) (a) The suitability and durability of materials used in the Engine must be established on the basis of experience or tests."
url: "https://avioverse.aero/regulations/easa/cs-e/subpart-a/cs-e-70-materials-and-manufacturing-methods"
---

# CS-E 70 Materials and Manufacturing Methods

Engines (CS-E) · CS-E · EAR revision 7 Dec 2023

IR Implementing rule

## CS-E 70 Materials and Manufacturing Methods

(See AMC E 70)

(a) The suitability and durability of materials used in the Engine must be established on the basis of experience or tests. The assumed design values of properties of materials must be suitably related to the minimum properties stated in the material specification.

(b) Manufacturing methods and processes must be such as to produce sound structure and mechanisms which retain the original mechanical properties under reasonable service conditions.

\[Amdt. No.: E/1]

IR — CS-E · ED Decision 2007/015/R · CS-E Easy Access Rules · EAR revision 7 Dec 2023

[All rules in SUBPART A – GENERAL](https://avioverse.aero/regulations/easa/cs-e/subpart-a)

Consolidated from the EASA Easy Access Rules (revision 7 Dec 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.