---
title: "21.A.120B Availability of operational suitability data — Annex I, Initial Airworthiness · Avioverse"
description: "In the case of a change affecting the operational suitability data, the holder of the supplemental type-certificate shall make available:"
url: "https://avioverse.aero/regulations/easa/initial-airworthiness/annex-i/section-a-technical-requirements/21-a-120b"
---

# 21.A.120B Availability of operational suitability data

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

IR Implementing rule

## 21.A.120B Availability of operational suitability data

In the case of a change affecting the operational suitability data, the holder of the supplemental type-certificate shall make available:

(a) at least one set of changes to the operational suitability data prepared in accordance with the applicable operational suitability data certification basis to all known EU operators of the changed aircraft before the operational suitability data is used by a training organisation or an EU operator; and

(b) any further change to the affected operational suitability data, to all known EU operators of the changed aircraft; and

(c) on request, the relevant parts of the changes in points (a) and (b) above, to:

1\. the competent authority responsible for verifying conformity with one or more elements of the affected operational suitability data; and

2\. any person required to comply with one or more elements of this set of operational suitability data.

IR · 21.A.120B — 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.