---
title: "21.A.90A Scope — Annex I, Initial Airworthiness · Avioverse"
description: "This Subpart establishes the procedure for the approval of changes to type-certificates, and establishes the rights and obligations of the applicants…"
url: "https://avioverse.aero/regulations/easa/initial-airworthiness/annex-i/section-a-technical-requirements/21-a-90a"
---

# 21.A.90A Scope

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

IR Implementing rule

## 21.A.90A Scope

This Subpart establishes the procedure for the approval of changes to type-certificates, and establishes the rights and obligations of the applicants for, and holders of, those approvals. This Subpart also defines standard changes that are not subject to an approval process under this Subpart. In this Subpart, references to type-certificates include type-certificate and restricted type-certificate.

IR · 21.A.90A — Regulation (EU) No 748/2012 · Regulation (EU) No 69/2014 · Initial Airworthiness Easy Access Rules · EAR revision 27 Nov 2025

GM Guidance material

## GM 21.A.90A Scope

The term ‘changes to the type certificate’ is consistently used in [Part 21](https://avioverse.aero/glossary/easa/part-21) Subpart D and E, as well as in the related AMC and GM. This term does not refer to changing the document that reflects the type certificate (TC) but to the elements of the TC as defined in 21.A.41. It means that the processes for the approval of changes, as described in the said two Subparts, do not only apply to changes to the type design, but may also apply to changes to:

the operating limitations;

the type certificate data sheet (TCDS) for airworthiness and emissions;

the applicable type-certification basis and environmental protection requirements with which the applicant has to demonstrate compliance;

any other conditions or limitations prescribed for the product by EASA;

the applicable [operational suitability data (OSD)](https://avioverse.aero/glossary/easa/operational-suitability-data) certification basis;

the OSD; and the TCDS for noise.

NOTE: OSD is only applicable to aircraft TCs and not to engine or propeller TCs. Therefore, changes to OSD are only relevant for changes to aircraft TCs.

GM · GM 21.A.90A — Regulation (EU) No 748/2012 · ED Decision 2019/018/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.