---
title: "21.A.129 Obligations of the production organisation — Annex I, Initial Airworthiness · Avioverse"
description: "Each manufacturer of a product, part, appliance, CMU or CMU component manufactured under this Subpart shall:"
url: "https://avioverse.aero/regulations/easa/initial-airworthiness/annex-i/section-a-technical-requirements/21-a-129"
---

# 21.A.129 Obligations of the production organisation

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

IR Implementing rule

## 21.A.129 Obligations of the production organisation

Each manufacturer of a product, part, appliance, CMU or CMU component manufactured under this Subpart shall:

(a) make each product, part, appliance, CMU or CMU component available for inspection by the competent authority;

(b) maintain at the place of manufacture the technical data and drawings necessary to determine whether the product, part, appliance, CMU or CMU component conforms to the applicable design data;

(c) maintain the production inspection system which ensures that each product, part, appliance, CMU or CMU component conforms to the applicable design data and is in a condition for safe operation;

(d) provide assistance to the holder of the type-certificate, restricted type-certificate or design approval in dealing with any continuing airworthiness actions that are related to the products, parts, appliances, CMUs or CMU components that have been produced;

(e) comply with Subpart A of this Section.

IR · 21.A.129 — Regulation (EU) No 748/2012 · Regulation (EU) 2024/1108 · Initial Airworthiness Easy Access Rules · EAR revision 27 Nov 2025

GM Guidance material

## GM 21.A.129(a) Availability for inspection by the competent authority

Each product, part or appliance should be made available for inspection at any time at the request of the competent authority.

It is recommended that a pre-defined plan of inspection points be established and agreed with the competent authority to be used as a basis for such inspections.

The manufacturer should provide such documentation, tools, personnel, access equipment etc. as necessary to enable the competent authority to perform the inspections.

GM · GM 21.A.129(a) — 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.