Approval of articles.
CFR · 2024-01-01 · US · Title 14
If an article is required to be approved under this chapter, it may be approved— (a) Under a PMA; (b) Under a TSO; (c) In conjunction with type certification procedures for a product; or (d) In any other manner approved by the FAA.
official document · source cfr-2024 · id 14:§ 21.8