14 C.F.R. § 21.473 Airworthiness certificates other than experimental.
Title 14 - Aeronautics and Space
For each amendment made to a standard airworthiness certificate under this subpart, the DAS shall follow the procedure manual prescribed in §21.441 and shall, before making that amendment— (a) Complete each flight test necessary to meet the applicable airworthiness requirements of this chapter; (b) Find that each applicable airworthiness requirement of this chapter is met; and (c) Find that the aircraft is in condition for safe operation.
Title 14: Aeronautics and Space
PART 21—CERTIFICATION PROCEDURES FOR PRODUCTS AND PARTS
Subpart M—Designated Alteration Station Authorization Procedures
§ 21.473 Airworthiness certificates other than experimental.
