H25.4 Airworthiness Limitations Section

• ED Decision 2020/024/R found in: CS-25 Amdt 27 - Large Aeroplanes (Jan 2023)

H25.4 Airworthiness Limitations Section ED Decision 2020/024/R (a) The Instructions for Continued Airworthiness must contain a section titled Airworthiness Limitations that is segregated and clearly distinguishable from the rest of the document. This section must set forth - (1) Each mandatory modification time, replacement time, structural inspection interval, and related structural inspection procedure approved under [CS 25.571](#_DxCrossRefBm1709820942); (2) Each mandatory replacement time, inspection interval, related inspection procedure, and all the critical design configuration control limitations approved under [CS 25.981](#_DxCrossRefBm1709821428) for the fuel tank system. (3) Any mandatory replacement time of EWIS components as defined in [CS 25.1701](#_DxCrossRefBm1709821840) (see [AMC Appendix H 25.4(a)(3)](#_DxCrossRefBm1709821969)). (4) A limit of validity (LOV) of the engineering data that supports the structural maintenance programme, stated as a total number of accumulated flight cycles or flight hours or both, approved under [CS 25.571](#_DxCrossRefBm1709820942). Until the full-scale fatigue testing is completed and the LOV is approved, the Airworthiness Limitations Section must specify an interim limitation restricting aircraft operation to not more than half the number of the cycles accumulated on the fatigue test article. (5) Each Certification Maintenance Requirement established to comply with any of the applicable requirements of CS-25 (see [AMC 25-19](#_DxCrossRefBm1709821408)). (6) Each mandatory replacement time, inspection interval, and related inspection and test procedure, and each critical design configuration control limitation for each lightning protection feature approved under [CS 25.954](#_DxCrossRefBm1709821378). (b) If the Instructions for Continued Airworthiness consist of multiple documents, the section required by this paragraph must be included in the principal manual. This section must contain a legible statement in a prominent location that reads: ‘The Airworthiness Limitations Section is approved and variations must also be approved’. [Amdt 25/5] [Amdt 25/19] [Amdt 25/20] [Amdt 25/26]