---
title: "21L.A.65 Application for a change to a type certificate — Annex Ib, Initial Airworthiness · Avioverse"
description: "An application for the approval of a change to a type certificate shall be made in a form and manner established by the Agency."
url: "https://avioverse.aero/regulations/easa/initial-airworthiness/annex-ib/section-a-technical-requirements/21l-a-65"
---

# 21L.A.65 Application for a change to a type certificate

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

IR Implementing rule

## 21L.A.65 Application for a change to a type certificate

(a) An application for the approval of a change to a type certificate shall be made in a form and manner established by the Agency.

(b) For a major change to a type certificate, the applicant shall include in the application a compliance demonstration plan for the demonstration of compliance in accordance with point 21L.A.66, along with a proposal for the type-certification basis and the applicable environmental protection requirements, prepared in accordance with the requirements and options specified in point 21L.B.81.

IR · 21L.A.65 — Regulation (EU) No 748/2012 · Regulation (EU) 2022/1358 · Initial Airworthiness Easy Access Rules · EAR revision 27 Nov 2025

AMC Acceptable means of compliance

## AMC1 21L.A.65 Application for a change to a type certificate

FORM AND MANNER

The applicant should file an application using the web-based ‘EASA Applicant Portal’ or the application forms for the approval of major changes/major repair designs or for the approval of minor changes/minor repair designs, which may be downloaded from the EASA website.

The forms should be completed in accordance with the instructions embedded at the bottom of the application forms, and sent to EASA by fax, email or regular mail following the information provided on the EASA website.

AMC · AMC1 21L.A.65 — Regulation (EU) No 748/2012 · ED Decision 2023/013/R · Initial Airworthiness Easy Access Rules · EAR revision 27 Nov 2025

AMC Acceptable means of compliance

## AMC1 21L.A.65(b) Application for a change to a type certificate

CERTIFICATION BASIS

Point 21L.A.65(b) ‘a proposal for the type-certification basis and the applicable environmental protection requirements, prepared in accordance with the requirements and options specified in point 21L.B.81’.

The proposed type-certification basis should include applicable certification specifications, proposed special conditions, proposed equivalent safety findings, as well as a proposed ‘elect to comply’ and proposed deviations, as applicable.

AMC · AMC1 21L.A.65(b) — Regulation (EU) No 748/2012 · ED Decision 2023/013/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-ib/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.