---
title: "21L.A.128 Notification of changes and cessation of activities — Annex Ib, Initial Airworthiness · Avioverse"
description: "The declared production organisation shall notify the competent authority without undue delay of the following:"
url: "https://avioverse.aero/regulations/easa/initial-airworthiness/annex-ib/section-a-technical-requirements/21l-a-128"
---

# 21L.A.128 Notification of changes and cessation of activities

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

IR Implementing rule

## 21L.A.128 Notification of changes and cessation of activities

The declared production organisation shall notify the competent authority without undue delay of the following:

(a) any changes to the information that has been declared in accordance with point (c) of point 21L.A.123;

(b) any changes to the management system for production that are significant to the showing of conformity or to the airworthiness and environmental compatibility characteristics of the product or part;

(c) the cessation of some of or all the activities covered by the declaration.

IR · 21L.A.128 — 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.128 Notification of changes and cessation of activities

CHANGES AND THEIR TIMELY NOTIFICATION

The declared production organisation should notify the competent authority of the following changes:

(a) Changes to the information that has been declared in accordance with point (c) of point 21L.A.123v (according to point 21L.A.128(a)):

change of the registered name of the organisation;

change of the registered address of the organisation’s [principal place of business](https://avioverse.aero/glossary/easa/principal-place-of-business) and, where applicable, change of the operating sites and/or their addresses;

change of the accountable manager and/or their contact details; and change of the scope of work.

These changes are notified to the competent authority by submitting a revised declaration of production capability.

(b) Significant changes to the management system for production (according to point 21L.A.128(b)):

significant changes to production capacity;

change to the manufacturing methods;

changes in the organisation structure, especially to those parts of the organisation in charge of quality;

change of the managers nominated according to point 21L.A.125(c)(2);

changes in the management system for production or quality system that may have an important impact on the conformity/airworthiness of each product or part; and changes in the placement or control of significant subcontracted work or supplied parts.

These changes are notified without revising the declaration of production capability.

Timely notification: The declared production organisation should notify the change(s) as soon as it has taken the decision to introduce the respective change(s) but no later than 10 working days after the change(s) became effective.

AMC · AMC1 21L.A.128 — 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.