21.A.31 Type design

(a)The type design shall consist of:

1.the drawings and specifications, and a listing of those drawings and specifications, necessary to define the configuration and the design features of the product, the UAS or the CMU shown to comply with the applicable type-certification basis and environmental protection requirements;

2.information on the materials and processes and on the methods of manufacture and assembly of the product and the CMU necessary to ensure the conformity of the product and the CMU;

3.an approved airworthiness limitations section of the instructions for continued airworthiness as defined by the applicable certification specifications; and

4.any other data that allows by comparison the determination of the airworthiness and, if relevant, the environmental characteristics of later products andCMUs of the same type.

(b)Each type design shall be adequately identified.