21L.A.205 Application for the approval of a repair design to a type-certified product

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

IRImplementing rule

21L.A.205Application for the approval of a repair design to a type-certified product

(a)An application for an approval of a repair design to a type-certified product shall be made in a form and manner established by the Agency.

(b)For the approval of a major repair design, the applicant shall include in the application, or submit after the initial application, a compliance demonstration plan:

1.containing a description of the damage and the repair design, identifying the configuration of the type design upon which the repair design is made;

2.identifying all the areas of the type design and the approved manuals that are changed or affected by the repair design;

3.identifying any reinvestigations necessary to demonstrate the compliance of the repair design and the areas affected by the repair design with the type-certification basis and the applicable environmental protection requirements, incorporated by reference in, as applicable, either the type certificate or the supplemental type certificate;

4.identifying any proposed amendments to the type-certification basis incorporated by reference in, as applicable, either the type certificate or supplemental type certificate;

5.specifying whether the certification data has been or will be prepared completely by the applicant or on the basis of an arrangement with the owner of the type-certification data.

IR · 21L.A.205 — Regulation (EU) No 748/2012 · Regulation (EU) 2022/1358 · Initial Airworthiness Easy Access Rules · EAR revision 27 Nov 2025

AMCAcceptable means of compliance

AMC1 21L.A.205(a)Application for the approval of a repair design to a type-certificated product

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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.205(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.205(b)Application for the approval of a repair design to a type-certificated product

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RECORD-KEEPING

(a)Relevant substantiation data associated with a new major repair design and record-keeping should include:

(1)the identification of the damage and the reporting source;

(2)the major repair design approval sheet identifying the applicable specifications and references of justifications;

(3)the repair drawing and/or instructions and scheme identifier;

(4)the correspondence with the type-certificate (TC) holder or the supplemental type-certificate (STC) holder if its advice on the design has been sought;

(5)the structural justification (static strength, fatigue, damage tolerance, flutter, etc.) or references to this data;

(6)if applicable, the effect on the certified noise and emissions levels and the characteristics that may affect the environmental compatibility of the product;

(7)the effect on the aircraft, engines and/or systems (performance, flight handling, etc., as appropriate);

(8)the effect on the maintenance programme;

(9)the effect on airworthiness limitations, the flight manual and the operating manual;

(10)any weight and moment changes; and

(11)special test requirements.

(b)Special consideration should be given to repairs that impose subsequent limitations on the part, product or appliance (e.g. engine turbine segments that may only be repaired a finite number of times, the number of repaired turbine blades per set, oversizing of fastener holes, etc.).

(c)Special consideration should also be given to life-limited parts and critical parts, notably with the involvement of the TC or STC holder, when deemed necessary under point 21L.A.208.

(d)Repairs to engines would normally only be accepted with the involvement of the TC holder.

AMC · AMC1 21L.A.205(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

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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