26.306 Fatigue-critical baseline structure

• 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)

26.306 Fatigue critical baseline structure Regulation (EU) 2020/1159 (a) A holder of a type-certificate (TC) or a restricted TC for a turbine-powered large aeroplane certified on or after 1 January 1958, for which the application for TC was submitted before 1 January 2019, and certified to carry 30 passengers or more, or with a payload capacity of 3 402 kg (7 500 lbs) or more shall identify and list the fatigue- critical baseline structures (FCBS) for all aeroplane model variations and derivatives included in the TC or restricted TC. (b) The holder of a type-certificate (TC) or a restricted TC shall submit the list of the structures referred to in paragraph (a) to the Agency before 26 August 2021 for approval. (c) Upon approval of the list referred to in paragraph (a) by the Agency, the holder of a type-certificate (TC) or a restricted TC shall make it available to operators and persons required to comply with points [26.330](#_DxCrossRefBm881534079) and [26.370](#_DxCrossRefBm881534105). (d) An applicant for a TC or restricted TC as referred to in letter (c) of [Article 1](#_DxCrossRefBm881534020) paragraph 2, for a turbine-powered large aeroplane to be certified to carry 30 passengers or more, or with a payload capacity of 3 402 kg (7 500 lbs) or more shall identify and list the fatigue-critical baseline structures (FCBS) for all aeroplane model variations and derivatives included in the TC or restricted TC. It shall submit the list of these structures to the Agency before 26 August 2021, or before the issuance of the certificate, whichever occurs later, for approval. (e) Upon approval of the list referred to in paragraph (d) by the Agency, the applicant for a TC or restricted TC as referred to letter (c) of [Article 1](#_DxCrossRefBm881534020) paragraph 2 shall make it available to operators and persons required to comply with point [26.370](#_DxCrossRefBm881534105). #### 26.306 Fatigue-critical baseline structure *Regulation (EU) 2024/2954* (a) A holder of a TC or a restricted TC for a large aeroplane certified on or after 1 January 1958, for which the application for a TC was submitted before 1 January 2019, and certified to carry 30 passengers or more, or with a payload capacity of 3 402 kg (7 500 lb) or more, shall identify and list the fatigue-critical baseline structures (FCBS) for all aeroplane model variations and derivatives included in the TC or restricted TC. (b) The holder of a TC or a restricted TC shall submit the list of the structures referred to in point (a) to the Agency before 26 August 2021, for approval. (c) Upon approval of the list referred to in point (a) by the Agency, the holder of a TC or a restricted TC shall make it available to the holders of a STC or a major change approval that are required to comply with point [26.330](#_DxCrossRefBm783605479), and to all known operators of such aeroplanes and, on request, to organisations responsible for the management of continuing airworthiness to support the operators that are required to comply with point [26.370](#_DxCrossRefBm783605505). (d) An applicant for a TC or a restricted TC, as referred to in [Article 1](#_DxCrossRefBm783605422)(2), point (c), for a large aeroplane to be certified to carry 30 passengers or more, or with a payload capacity of 3 402 kg (7 500 lb) or more, shall identify and list the FCBS for all aeroplane model variations and derivatives included in the TC or restricted TC. It shall submit the list of these structures to the Agency before 26 August 2021, or before the issuance of the certificate, whichever occurs later, for approval. (e) Upon approval of the list referred to in point (d) by the Agency, the applicant for a TC or a restricted TC, as referred to in [Article 1](#_DxCrossRefBm783605422)(2), point (c), shall make it available to all known operators of such aeroplanes and, on request, to organisations responsible for the management of continuing airworthiness to support the operators that are required to comply with point [26.370](#_DxCrossRefBm783605505).