14 C.F.R. § 21.615 FAA inspection.
Title 14 - Aeronautics and Space
Upon the request of the Administrator, each manufacturer of an article under a TSO authorization shall allow the Administrator to— (a) Inspect any article manufactured under that authorization; (b) Inspect the manufacturer's quality control system; (c) Witness any tests; (d) Inspect the manufacturing facilities; and (e) Inspect the technical data files on that article.
Title 14: Aeronautics and Space
PART 21—CERTIFICATION PROCEDURES FOR PRODUCTS AND PARTS
Subpart O—Technical Standard Order Authorizations
§ 21.615 FAA inspection.