---
title: "CS 25.1535 ETOPS Design approval — CS-25 · Avioverse"
description: "For an aeroplane configuration to be capable of ETOPS, the following are required:"
url: "https://avioverse.aero/regulations/easa/cs-25/subpart-g/cs-25-1535"
---

# CS 25.1535 ETOPS Design approval

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

IR Implementing rule

## CS 25.1535 ETOPS Design approval

For an aeroplane configuration to be capable of ETOPS, the following are required:

(a) Compliance with the requirements of CS-25 considering the maximum flight duration and the longest diversion time for which approval is being sought.

(b) For Early ETOPS, approval of the engine for ETOPS capability in compliance with CS-E 1040.

(c) Consideration must have been given to the crew workload and operational implications and the flight crew’s and passengers’ physiological needs of continued operations with failure effects for the longest diversion time for which approval is being sought.

(d) The appropriate capability and limitations must have been established. (See AMC 20-6.)

(See AMC 20-6)

\[Amdt 25/10]

\[Amdt 25/21]

IR · CS 25.1535 — CS-25 · ED Decision 2018/005/R · CS-25 Easy Access Rules · EAR revision 26 Jan 2023

[All rules in SUBPART G – OPERATING LIMITATIONS AND INFORMATION](https://avioverse.aero/regulations/easa/cs-25/subpart-g)

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.