14 C.F.R. § 21.139 Quality control.
Title 14 - Aeronautics and Space
The applicant must show that he has established and can maintain a quality control system for any product, for which he requests a production certificate, so that each article will meet the design provisions of the pertinent type certificate.
Title 14: Aeronautics and Space
PART 21—CERTIFICATION PROCEDURES FOR PRODUCTS AND PARTS
Subpart G—Production Certificates
§ 21.139 Quality control.
