{"data":{"id":"us/14-cfr-21.319","jurisdiction":"us","citation":"14 CFR 21.319","heading":"Design changes.","body":"(a) Classification of design changes. (1) A “minor change” to the design of an article produced under a PMA is one that has no appreciable effect on the approval basis.\n(2) A “major change” to the design of an article produced under a PMA is any change that is not minor.\n(b) Approval of design changes. (1) Minor changes to the basic design of a PMA may be approved using a method acceptable to the FAA.\n(2) The PMA holder must obtain FAA approval of any major change before including it in the design of an article produced under a PMA.","path":["Title 14—Aeronautics and Space","CHAPTER I—FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION","SUBCHAPTER C—AIRCRAFT","PART 21—CERTIFICATION PROCEDURES FOR PRODUCTS AND ARTICLES","Subpart K—Parts Manufacturer Approvals"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-14.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:24:20Z","sha256":"e1dfe112b469c6005c206f594d65501441268ffcb0a45a74b132c1d536bba560","source_id":"us-cfr","stale":true,"prev":"us/14-cfr-21.316","next":"us/14-cfr-21.320"},"notice":"GroundRules: Original legal text. Not legal advice."}