---
title: "21.A.19 Changes requiring a new type-certificate — Annex I, Initial Airworthiness · Avioverse"
description: "Any natural or legal person proposing a change to a product shall apply for a new type-certificate if the Agency finds that the change in the design…"
url: "https://avioverse.aero/regulations/easa/initial-airworthiness/annex-i/section-a-technical-requirements/21-a-19"
---

# 21.A.19 Changes requiring a new type-certificate

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

IR Implementing rule

## 21.A.19 Changes requiring a new type-certificate

Any natural or legal person proposing a change to a product shall apply for a new type-certificate if the Agency finds that the change in the design, power, thrust, or mass is so extensive that a substantially complete investigation of compliance with the applicable type-certification basis is required.

Any natural or legal person proposing a change to a UAS or a CMU shall apply for a new type-certificate if the Agency finds that the change in the design is so extensive that a substantially complete investigation of compliance with the applicable type-certification basis is required.

IR · 21.A.19 — Regulation (EU) No 748/2012 · Regulation (EU) 2024/1108 · 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.