Text in force at CS25-28: from CS25-27, effective 7 Dec 2021.
(See AMC 25.603; for composite materials, see AMC 20-29; for use of glass in passenger cabins, see AMC No 2 to CS 25.603(a)) The suitability and durability of materials used for parts, the failure of which could adversely affect safety, must:
(a) be established on the basis of experience or tests; (see AMC No°1 to CS 25.603(a));
(b) conform to approved specifications that ensure their having the strength and other properties assumed in the design data (see AMC 25.603(b)); and
(c) take into account the effects of environmental conditions, e.g. temperature and humidity, expected in service.
ED Decision 2021/015/R · Source