{"data":{"id":"us/14-cfr-21.217","jurisdiction":"us","citation":"14 CFR 21.217","heading":"Duration.","body":"Unless sooner surrendered, superseded, revoked, or otherwise terminated, provisional airworthiness certificates are effective for the duration of the corresponding provisional type certificate, amendment to a provisional type certificate, or provisional amendment to the type certificate.","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 I—Provisional Airworthiness 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":"6e7c6b281688aa7d4016b9142fa1452de662b02321f4797e57bc29e2607deb6d","source_id":"us-cfr","stale":true,"prev":"us/14-cfr-21.215","next":"us/14-cfr-21.219"},"notice":"GroundRules: Original legal text. Not legal advice."}