(a) The suitability and durability of materials used in the propeller must:
- (1) Be established on the basis of experience, tests, or both.
- (2) Account for environmental conditions expected in service.
- (b) All materials and manufacturing methods must conform to specifications acceptable to the Administrator.
- (c) The design values of properties of materials must be suitably related to the most adverse properties stated in the material specification for applicable conditions expected in service.
[Amdt. 35-8, 73 FR 63347, Oct. 24, 2008]