{"data":{"id":"us/14-cfr-121.279","jurisdiction":"us","citation":"14 CFR 121.279","heading":"Control of engine rotation.","body":"(a) Except as provided in paragraph (b) of this section, each airplane must have a means of individually stopping and restarting the rotation of any engine in flight.\n(b) In the case of turbine engine installations, a means of stopping the rotation need be provided only if the Administrator finds that rotation could jeopardize the safety of the airplane.","path":["Title 14—Aeronautics and Space","CHAPTER I—FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION","SUBCHAPTER G—AIR CARRIERS AND OPERATORS FOR COMPENSATION OR HIRE: CERTIFICATION AND OPERATIONS","PART 121—OPERATING REQUIREMENTS: DOMESTIC, FLAG, AND SUPPLEMENTAL OPERATIONS","Subpart J—Special Airworthiness Requirements"],"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":"22b4d6c4c4f3b7b0fb9d458e7037efd03fdead31c496197e2f8be92f943e434b","source_id":"us-cfr","stale":true,"prev":"us/14-cfr-121.277","next":"us/14-cfr-121.281"},"notice":"GroundRules: Original legal text. Not legal advice."}