AMC 25.603 Suitability and durability of materials

• ED Decision 2021/015/R found in: CS-25 Amdt 27 - Large Aeroplanes (Jan 2023)

AMC 25.603 Suitability and durability of materials ED Decision 2021/015/R The term ‘material’ is differently interpreted, ranging from raw feedstock material to the material state in a final complex part configuration that may have undergone various processes. [CS 25.603](#_DxCrossRefBm1709821059), [CS 25.605](#_DxCrossRefBm1709821066), [CS 25.613](#_DxCrossRefBm1709821065), and [AMC 25.613](#_DxCrossRefBm1709821067) should therefore be considered together to ensure the coherent and safe design and production of parts and thus maintain occupant and aeroplane safety throughout the aeroplane’s operational life. This is of growing importance as more and more production methods allow the design of complex part configurations for which the characteristics of the materials are defined close to completion of the part production, e.g. castings, composite resin transfer methods, bonding, or additive manufacturing methods. The applicants should therefore discuss with EASA, at an early stage of the certification project, potential details supporting the means of compliance with [CS 25.603](#_DxCrossRefBm1709821059), [CS 25.605](#_DxCrossRefBm1709821066), and [CS 25.613](#_DxCrossRefBm1709821065). Note: organisations engaged in the design and certification of modifications or repairs should also comply with these CSs and consider the related AMC. Appropriately defined tests and analysis pyramids (e.g. as outlined in AMC 20-29 for composite materials) should support the certification of materials, processes, and/or fabrication methods, including the development of the associated design values in more complex part configurations and assemblies. [Amdt No: 25/27]