26.333 Damage tolerance data for STCs and repairs affecting those STCs approved on or after 1 September 2003

• 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)

26.333 Damage tolerance data for STCs and repairs to those STCs approved on or after 1 September 2003 Regulation (EU) 2020/1159 (a) A holder of a change approval that was issued on or after 1 September 2003 shall: (i) for changes and published repairs identified in accordance with paragraph (a)(i) of point [26.332](#_DxCrossRefBm881534075) and paragraph (a)(iii) of point [26.332](#_DxCrossRefBm881534075), perform a damage tolerance evaluation; (ii) establish and document the associated damage tolerance inspection, unless it has already been done. (b) The holder of a change approval shall submit the damage tolerance data resulting from the damage tolerance evaluation performed in accordance with paragraph (a)(i) to the Agency before 26 February 2023, for approval, unless it is already approved in accordance with point 21.B.111 of Annex I (Part 21) to Regulation (EU) No 748/2012. (c) By way of derogation from paragraph (b), for changes that did not have a damage tolerance evaluation requirement in the certification basis, the holder of a change approval identified in paragraph (a) shall submit the damage tolerance data resulting from the damage tolerance evaluation performed in accordance with paragraph (a) to the Agency, within the following deadlines, whichever occurs later, for approval: (i) prior to an aeroplane with that change embodied being operated in accordance with Annex IV (Part-CAT) to Regulation (EU) No 965/2012[[4]](#_ftn4); or (ii) before 26 February 2023. --- [[4]](#_ftnref4) Regulation (EU) No 965/2012 of 5 October 2012 laying down technical requirements and administrative procedures related to air operations pursuant to Regulation (EC) No 216/2008 of the European Parliament and of the Council (OJ L 296, 25.10.2012, p. 1). #### 26.333 Damage tolerance data for STCs and repairs affecting those STCs approved on or after 1 September 2003 *Regulation (EU) 2024/2954* (a) For a change approval that was issued on or after 1 September 2003, the approval holder referred to in point [26.330](#_DxCrossRefBm783605479)(a) shall: (i) for changes and published repairs identified in accordance with points (a)(i) and (a)(iii) of point [26.332](#_DxCrossRefBm783605475), respectively, perform a damage tolerance evaluation; (ii) establish and document the associated DTI, unless this has already been done. (b) The approval holder referred to in point (a) shall submit the damage tolerance data resulting from the damage tolerance evaluation performed in accordance with point (a)(i) to the Agency before 26 February 2023, for approval, unless it is already approved in accordance with point 21.B.111 of Annex I (Part 21) to [Regulation (EU) No 748/2012](https://eur-lex.europa.eu/eli/reg/2012/748/oj/eng). (c) By way of derogation from point (b), for changes that did not have a damage tolerance evaluation requirement in the certification basis, the approval holder referred to in point (a) shall submit the damage tolerance data resulting from the damage tolerance evaluation performed in accordance with point (a) to the Agency, within the following deadlines, whichever occurs later, for approval: (i) prior to an aeroplane with that change incorporated being operated in accordance with Annex IV (Part- CAT) to [Regulation (EU) No 965/2012](https://eur-lex.europa.eu/eli/reg/2012/965/oj/eng); or (ii) before 26 February 2023.