---
title: "21.B.453 Issuance of a repair design approval — Annex I, Initial Airworthiness · Avioverse"
description: "The Agency shall issue an approval of a major repair design, provided that:"
url: "https://avioverse.aero/regulations/easa/initial-airworthiness/annex-i/section-b-procedures-for-competent-authorities/21-b-453"
---

# 21.B.453 Issuance of a repair design approval

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

IR Implementing rule

## 21.B.453 Issuance of a repair design approval

(a) The Agency shall issue an approval of a major repair design, provided that:

1\. the applicant has demonstrated its capability in accordance with point 21.A.432B;

2\. the applicant has complied with point 21.A.433;

3\. the Agency, through its verification of the demonstration of compliance in accordance with the level of involvement established pursuant to point 21.B.100(a), has not found any non-compliance with the type-certification basis and the applicable environmental protection requirements; and

4\. no feature or characteristic has been identified that may make the product, the UAS or the CMU unsafe for the use for which certification is requested.

(b) The Agency shall issue an approval of a minor repair design, provided that the applicant has complied with points 2 and 4 of point (a) and provided that the Agency, through its verification of the demonstration of compliance in accordance with the level of involvement pursuant to point 21.B.100(b), has not found any non-compliance with the type-certification basis and the applicable environmental protection requirements.

IR · 21.B.453 — Regulation (EU) No 748/2012 · Regulation (EU) 2025/1065 · Initial Airworthiness Easy Access Rules · EAR revision 27 Nov 2025

[All rules in SECTION B — PROCEDURES FOR COMPETENT AUTHORITIES](https://avioverse.aero/regulations/easa/initial-airworthiness/annex-i/section-b-procedures-for-competent-authorities)

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.