{"data":{"id":"us/14-cfr-39.21","jurisdiction":"us","citation":"14 CFR 39.21","heading":"Where can I get information about FAA-approved alternative methods of compliance?","body":"Each airworthiness directive identifies the office responsible for approving alternative methods of compliance. That office can provide information about alternatives it has already approved.","path":["Title 14—Aeronautics and Space","CHAPTER I—FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION","SUBCHAPTER C—AIRCRAFT","PART 39—AIRWORTHINESS DIRECTIVES"],"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":"e602c29b085028ce14fbcc0e10df0dc5885733bc6c5c807f9ce75f264496fe60","source_id":"us-cfr","stale":true,"prev":"us/14-cfr-39.19","next":"us/14-cfr-39.23"},"notice":"GroundRules: Original legal text. Not legal advice."}