---
title: "European Technical Standard Orders (CS-ETSO) — CS-ETSO · Avioverse"
description: "Browse European Technical Standard Orders (CS-ETSO) (CS-ETSO): implementing rules, AMC and GM with the official reference on every paragraph. EAR…"
url: "https://avioverse.aero/regulations/easa/cs-etso"
---

EASA Easy Access Rules

# European Technical Standard Orders (CS-ETSO)

CS-ETSO 287 paragraphs EAR revision 1 Oct 2026

Regulation scope extract · [SUBPART A](https://avioverse.aero/regulations/easa/cs-etso/subpart-a/subpart-a)

> 1.1 The requirements for the issue of European Technical Standard Order (ETSO) authorisations are found in Part 21, Section A, Subpart O. 1.2 The marking requirements for the issue of European Technical Standard Order (ETSO) authorisations are found in Part 21, Section A, Subpart Q.

IR · SUBPART A — CS-ETSO · CS-ETSO Easy Access Rules · EAR revision 1 Oct 2026

- [SUBPART A – GENERAL SUBPART A](https://avioverse.aero/regulations/easa/cs-etso/subpart-a)
- [SUBPART B – LIST OF ETSOs SUBPART B – ETSO-2C522](https://avioverse.aero/regulations/easa/cs-etso/subpart-b)

Consolidated from the EASA Easy Access Rules (revision 1 Oct 2026, 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.