21.A.433 Requirements for approval of a repair design

• Regulation (EU) 2021/699 found in: Initial Airworthiness and Environmental Protection (748/2012) Part-21 Part-21L (Jul 2024)
• Regulation (EU) 2025/1065 found in: Initial Airworthiness and Environmental Protection (748/2012) (Nov 2025)

21.A.433 Requirements for approval of a repair design Regulation (EU) 2021/699 (a)     A repair design shall only be approved: 1.       when it has been demonstrated, following the certification programme referred to in point [21.A.432C](#_DxCrossRefBm1649096984)(b), that the repair design complies with the type-certification basis incorporated by reference in, as applicable, either the type-certificate, the supplemental type-certificate or the APU ETSO authorisation, as well as with any amendments established and notified by the Agency in accordance with point [21.B.450](#_DxCrossRefBm1649097422); 2.       when compliance with the type-certification basis that applies in accordance with point (a)(1) has been declared and the justifications of compliance have been recorded in the compliance documents; 3.       when no feature or characteristic has been identified that may make the product unsafe for the uses for which certification is requested; 4.       where the applicant has specified that it provided certification data on the basis of an arrangement with the owner of the type-certification data in accordance with point [21.A.432C](#_DxCrossRefBm1649096984)(b)(7): (i)      when the holder has indicated that it has no technical objection to the information submitted under point (a)(2); and (ii)     when the holder has agreed to collaborate with the repair design approval holder to ensure discharge of all obligations for continued airworthiness of the changed product through compliance with point [21.A.451](#_DxCrossRefBm1649096957). 5.       when, for a repair to an aeroplane subject to point 26.302 of Annex I to [Regulation (EU) 2015/640](https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=CELEX%3A32015R0640&qid=1631607761465), it has been demonstrated that the structural integrity of the repair and affected structure is at least equivalent to the level of structural integrity established for the baseline structure by point 26.302 of Annex I to [Regulation (EU) 2015/640](https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=CELEX%3A32015R0640&qid=1631607761465). (b)     The applicant shall submit to the Agency the declaration referred to in point (a)(2) and, on request by the Agency, all necessary substantiation data. #### 21.A.433 Requirements for approval of a repair design *Regulation (EU) 2025/1065* (a) A repair design shall only be approved: 1. when it has been demonstrated, following the certification programme referred to in point [21.A.432C](#_DxCrossRefBm485230475)(b), that the repair design complies with the type‑certification basis and the environmental protection requirements incorporated by reference in, as applicable, either the type certificate, the supplemental type certificate or the APU ETSO authorisation, as well as with any amendments established and notified by the Agency in accordance with point [21.B.450](#_DxCrossRefBm485230915); 2. when compliance with the type‑certification basis and the environmental protection requirements that apply in accordance with point (a)1 has been declared and the justifications of compliance have been recorded in the compliance documents; 3. when no feature or characteristic has been identified that may render the product, the UAS or the CMU unsafe for the use for which certification is requested; 4. when the applicant has specified that it has provided certification data on the basis of an arrangement with the owner of the type-certification data in accordance with point [21.A.432C](#_DxCrossRefBm485230475)(b)(7): (i) when the holder has indicated that it has no technical objection to the information submitted under point (a)(2) of this point; and (ii) when the holder has agreed to collaborate with the repair design approval holder to ensure the discharge of all the obligations with regard to the continued airworthiness of the changed product, changed UAS or changed CMU through compliance with point [21.A.451](#_DxCrossRefBm485230448). 5. when, for a repair to an aeroplane subject to point 26.302 of Annex I to [Regulation (EU) 2015/640](https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=CELEX%3A32015R0640&qid=1631607761465), it has been demonstrated that the structural integrity of the repair and affected structure is at least equivalent to the level of structural integrity established for the baseline structure by point 26.302 of Annex I to [Regulation (EU) 2015/640](https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=CELEX%3A32015R0640&qid=1631607761465). (b) The applicant shall submit to the Agency the declaration referred to in point (a)(2) and, on request by the Agency, all necessary substantiation data.