{"data":{"id":"us/14-cfr-21.77","jurisdiction":"us","citation":"14 CFR 21.77","heading":"Duration.","body":"(a) Unless sooner surrendered, superseded, revoked, or otherwise terminated, provisional type certificates and amendments thereto are effective for the periods specified in this section.\n(b) A Class I provisional type certificate is effective for 24 months after the date of issue.\n(c) A Class II provisional type certificate is effective for twelve months after the date of issue.\n(d) An amendment to a Class I or Class II provisional type certificate is effective for the duration of the amended certificate.\n(e) A provisional amendment to a type certificate is effective for six months after its approval or until the amendment of the type certificate is approved, whichever is first.","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 C—Provisional Type Certificates"],"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":"5b850aca73e4817a272ba5b7f537406fdf42e7f1e6e747b372c27fbbe95dc0f8","source_id":"us-cfr","stale":true,"prev":"us/14-cfr-21.75","next":"us/14-cfr-21.79"},"notice":"GroundRules: Original legal text. Not legal advice."}