---
title: "GM No 1 to 21.A.126(a)(3) Production inspection system – List of specifications — Annex I, Initial Airworthiness · Avioverse"
description: "It is the responsibility of: The designer, to define all necessary processes, techniques and methods to be followed during manufacture (21.A.31) and this…"
url: "https://avioverse.aero/regulations/easa/initial-airworthiness/annex-i/section-a-technical-requirements/gm-no-1-to-21-a-126-a-3-production-inspection-system-list-of-specifications"
---

# GM No 1 to 21.A.126(a)(3) Production inspection system – List of specifications

Annex I · Regulation (EU) No 748/2012 · EAR revision 27 Nov 2025

GM Guidance material

## GM No 1 to 21.A.126(a)(3) Production inspection system – List of specifications

It is the responsibility of:

1\. The designer, to define all necessary processes, techniques and methods to be followed during manufacture (21.A.31) and this information will be provided as part of the applicable design data.

2\. The manufacturer, to ensure that all processes are carried out strictly in accordance with the specifications provided as part of the applicable design data.

GM — Regulation (EU) No 748/2012 · ED Decision 2012/020/R · Initial Airworthiness Easy Access Rules · EAR revision 27 Nov 2025

[All rules in SECTION A — TECHNICAL REQUIREMENTS](https://avioverse.aero/regulations/easa/initial-airworthiness/annex-i/section-a-technical-requirements)

Consolidated from the EASA Easy Access Rules (revision 27 Nov 2025, 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.