26.330 Damage tolerance data for existing supplemental type certificates (STCs), other existing major changes and existing repairs affecting those STCs or changes

• Regulation (EU) 2020/1159 found in: CS-26 Additional Airworthiness Specifications for Operations (No 2015/640) Part-26 (Mar 2023)
• Regulation (EU) 2024/2954 found in: CS-26 Additional Airworthiness Specifications for Operations (Part-26) (Oct 2025)

26.330 Damage tolerance data for existing supplemental type-certificates (STCs), other existing major changes and existing repairs affecting those changes or STCs Regulation (EU) 2020/1159 (a) A holder of a STC issued before 26 February 2021 for a major change, or a holder of a major change that has been deemed approved in accordance with Article 4 of Regulation (EU) No 748/2012, for large aeroplanes certified on or after 1 January 1958 to carry 30 or more passengers or that have a payload capacity of 3 402 kg (7 500 lbs) or more, shall support operators required to comply with point [26.370(a)(ii)](#_DxCrossRefBm881534105) by addressing the adverse effects of those changes and repairs to those changes on the aeroplane structure and shall comply with the requirements set out in points [26.331](#_DxCrossRefBm881534107) to [26.334](#_DxCrossRefBm881534071). (b) Paragraph (a) shall not apply to major changes and repairs to an aeroplane model first certified prior to 26 February 2021 when that aeroplane model meets any of the following conditions: (i) it is listed in Table A.1 of [Appendix 1](#_DxCrossRefBm881534163); (ii) it does not operate anymore after 26 February 2021; (iii) it has not been certified to conduct civil operation with a payload or passengers; (iv) it has a restricted TC and have been certified in accordance with damage tolerance requirements, provided that it is not operated beyond 75 % of its design service goal and is primarily operated in support of the restricted TC holders manufacturing operation; (v) it is certified with a restricted TC and is designed primarily for firefighting; (c) Paragraph (a) shall not apply to major changes and repairs to an aeroplane first certified prior to 26 February 2021 when the changes or repairs are not, and will not be, embodied on any aeroplane in operation on or after 26 August 2022. (d) The exceptions provided for in paragraph (b)(ii) to (b)(v) and (c) shall apply only after the change approval holder submits a list of changes that affect fatigue-critical baseline structure, together with information supporting the reasons why each change has been included in the list, to the Agency before 26 February 2022 for approval. #### 26.330 Damage tolerance data for existing supplemental type certificates (STCs), other existing major changes and existing repairs affecting those STCs or changes *Regulation (EU) 2024/2954* (a) A holder of a STC issued before 26 February 2021, or a holder of a major change approval that has been deemed approved in accordance with Article 4 of [Regulation (EU) No 748/2012](https://eur-lex.europa.eu/eli/reg/2012/748/oj/eng), for large aeroplanes certified on or after 1 January 1958 to carry 30 or more passengers, or with a payload capacity of 3 402 kg (7 500 lb) or more, shall address the adverse effects of those changes and repairs to those changes on the aeroplane structure to support the compliance with point [26.370](#_DxCrossRefBm783605505)(a)(ii) and shall comply with the requirements set out in points [26.331](#_DxCrossRefBm783605507) to [26.334](#_DxCrossRefBm783605471). (b) Point (a) shall not apply to major changes and repairs to a large aeroplane model first certified before 26 February 2021 when that aeroplane model meets any of the following conditions: (i) it is listed in Table A.1 of [Appendix 1](#_DxCrossRefBm783605548) to this Annex; (ii) it is not operated anymore after 26 February 2021; (iii) it has not been certified to conduct civil operation with a payload or passengers; (iv) it has a restricted TC and has been certified in accordance with damage tolerance requirements, provided that it is not operated beyond 75 % of its design service goal and is primarily operated in support of the restricted TC holder’s manufacturing operation; (v) it is issued with a restricted TC and is designed primarily for firefighting. (c) Point (a) shall not apply to major changes and repairs to a large aeroplane first certified before 26 February 2021 when the changes or repairs are not, and will not be, incorporated in any large aeroplane in operation on or after 26 August 2022. (d) The exceptions provided for in points (b)(ii) to (v) and (c) shall apply only after the change approval holder submits a list of changes that affect the FCBS, together with information supporting the reasons why each change has been included in the list, to the Agency before 26 February 2022 for approval.