{"data":{"id":"us/14-cfr-23.2245","jurisdiction":"us","citation":"14 CFR 23.2245","heading":"Aeroelasticity.","body":"(a) The airplane must be free from flutter, control reversal, and divergence—\n(1) At all speeds within and sufficiently beyond the structural design envelope;\n(2) For any configuration and condition of operation;\n(3) Accounting for critical degrees of freedom; and\n(4) Accounting for any critical failures or malfunctions.\n(b) The applicant must establish tolerances for all quantities that affect flutter.","path":["Title 14—Aeronautics and Space","CHAPTER I—FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION","SUBCHAPTER C—AIRCRAFT","PART 23—AIRWORTHINESS STANDARDS: NORMAL CATEGORY AIRPLANES","Subpart C—Structures"],"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":"c04b38d37393549381a8edcdf211a617fde704250ac47ffc7d719838245be9a6","source_id":"us-cfr","stale":true,"prev":"us/14-cfr-23.2240","next":"us/14-cfr-23.2250"},"notice":"GroundRules: Original legal text. Not legal advice."}