{"data":{"id":"us/14-cfr-31.31","jurisdiction":"us","citation":"14 CFR 31.31","heading":"General.","body":"The suitability of each design detail or part that bears on safety must be established by tests or analysis.","path":["Title 14—Aeronautics and Space","CHAPTER I—FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION","SUBCHAPTER C—AIRCRAFT","PART 31—AIRWORTHINESS STANDARDS: MANNED FREE BALLOONS","Subpart D—Design Construction"],"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":"3df074174c70ede1ef11638c39ede7b22fe016b5b15c80c126fdc74b744364b0","source_id":"us-cfr","stale":true,"prev":"us/14-cfr-31.27","next":"us/14-cfr-31.33"},"notice":"GroundRules: Original legal text. Not legal advice."}