21L.A.122 Eligibility

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

IRImplementing rule

21L.A.122Eligibility

Any natural or legal person (‘organisation’) may declare their production capability under this Subpart, if that person:

(a)has applied or intends to apply for the approval of the design of the product or part in accordance with this Annex; or

(b)has declared or intends to declare the compliance of an aircraft design in accordance with this Annex; or

(c)is collaborating with the applicant for, or holder of, an approval of the design of the product to be issued or issued in accordance with this Annex, or with the organisation that has declared or intends to declare the compliance of that aircraft design in accordance with this Annex, in order to ensure that the manufactured product or part is in conformity to that design, and to ensure the continued airworthiness of the product or part.

IR · 21L.A.122 — Regulation (EU) No 748/2012 · Regulation (EU) 2022/1358 · Initial Airworthiness Easy Access Rules · EAR revision 27 Nov 2025

GMGuidance material

GM1 21L.A.122(a);(b) Eligibility

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INTERFACE BETWEEN DESIGN AND PRODUCTION In the natural or legal person that declares the production capability there is a need for an interface between staff responsible for design and staff responsible for production. This interface may be achieved through common design and production procedures. Other ways to document this interface may be also used. For example, by defining simple flow charts supported by self-explanatory forms, or by task descriptions of the responsible functions in the organisation. IT-based enterprise resource planning (ERP) systems may be used to ensure and to demonstrate that there is a correct flow of information on the basis of defined and visible workflows with assigned roles and release gates. Such interface normally covers the following aspects: the transfer of applicable design data from design to production (including their status: approved / non-approved); the development of own manufacturing data; the management of continued airworthiness matters and required actions; the cooperation in compliance-demonstration activities (e.g. manufacturing and testing prototype models and test specimens); the management of production deviations and non-conforming parts; and the configuration control of manufactured parts.

GM · GM1 21L.A.122(a) — Regulation (EU) No 748/2012 · ED Decision 2023/013/R · Initial Airworthiness Easy Access Rules · EAR revision 27 Nov 2025

AMCAcceptable means of compliance

AMC1 21L.A.122(c)Eligibility

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ARRANGEMENTS BETWEEN DESIGN AND PRODUCTION ORGANISATIONS In accordance with point 21L.A.122(c), the natural or legal person that declares their production capability (referred to as ‘declared production organisation’ in this AMC and in GM1 21L.A.122(c)) must collaborate with the applicant for, or holder of, an approval of the design of the product, or with the organisation that has declared or intends to declare the compliance of that aircraft design (referred to as ‘design organisation’ in this AMC and in GM1 21L.A.122(c)) to ensure that the manufactured product or part is in conformity to that design, and to ensure the continued airworthiness of the product or part. An acceptable means of compliance with point 21L.A.122(c) is an arrangement documented between the declared production organisation and the design organisation that are separate legal entities.

AMC · AMC1 21L.A.122(c) — Regulation (EU) No 748/2012 · ED Decision 2023/013/R · Initial Airworthiness Easy Access Rules · EAR revision 27 Nov 2025

GMGuidance material

GM1 21L.A.122(c)Eligibility

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ARRANGEMENT BETWEEN DESIGN AND PRODUCTION ORGANISATIONS — FORMAT To define such a design–production interface, the following sample form is offered:

ARRANGEMENT SAMPLE FORM

ARRANGEMENT in accordance with point 21L.A.122(c) of Annex Ib (Part 21 Light)
- The undersigned agree to commit to the following:		- Relevant interface procedures
The design organisation [NAME] takes responsibility to: assure the correct and timely transfer of up-to-date applicable design data (e.g. drawings, material specifications, dimensional data, processes, surface treatments, shipping conditions, quality requirements, etc.) to the declared production organisation [NAME]; provide visible statement(s) of approved or declared design data.
The declared production organisation [NAME] takes responsibility to: assist the design organisation [NAME] in dealing with continuing airworthiness matters and for required actions; assist the design organisation [NAME] in case of products prior to type certification in demonstrating compliance with the applicable certification specifications and environmental protection requirements; develop, where applicable, its own manufacturing data in compliance with the airworthiness data package.
The design organisation [NAME] and the declared production organisation [NAME] take joint responsibility to: deal adequately with production deviations and non-conforming parts in accordance with the applicable procedures of the design organisation and the declared production organisation; achieve adequate configuration control of manufactured parts to enable the declared production organisation to make the final determination and identification for conformity.
The scope of production covered by this arrangement is detailed in [DOCUMENT REFERENCE / ATTACHED LIST].
- Transfer of applicable design data: - (keep only the text relevant for either a design-approval case or a declaration-of-design-compliance case) - The design approval holder [NAME] acknowledges that the approved data provided, controlled, and modified in accordance with the arrangement is recognised as approved by the competent authority and, therefore, the parts manufactured in accordance with this data and found in a condition for safe operation may be released certifying that the item(s) has (have) been manufactured in conformity to approved design data and is in a condition for safe operation. When indicated so by the applicant for design approval [NAME], before the issuance of the design approval, the design data provided is considered not approved and, therefore, the parts manufactured in accordance with this data may be released certifying only their conformity. The declarant of the design compliance [NAME] acknowledges that the declared data provided, controlled and modified in accordance with the arrangement is recognised as declared by the competent authority and, therefore, the parts manufactured in accordance with this data and found in a condition for safe operation may be released certifying that the parts have been manufactured in accordance with the design data of a declaration of design compliance in accordance with Subpart C, F or N of Section A of Annex Ib (Part 21 Light). When indicated so by [NAME] that intends to submit a declaration of design compliance, before the declaration of design compliance, the design data provided is considered not approved and, therefore, the parts manufactured in accordance with this data may be released certifying only their conformity.
- Direct delivery authorisation: This acknowledgment includes also [OR does not include] the general agreement for direct delivery to end users in order to guarantee continued airworthiness control of the released parts.
For the [NAME of the design organisation] - - Date: Signature: xx.xx.xxxx [NAME in block letters]	For the [NAME of the declared production organisation] - Date: Signature: xx.xx.xxxx [NAME in block letters]

GM · GM1 21L.A.122(c) — 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

Consolidated from the EASA Easy Access Rules (revision 27 Nov 2025, extracted 17 Aug 2026) for convenience. Not the official publication — verify against the Official Journal of the European Union and the EASA publications before operational use.

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