{"data":{"id":"us/14-cfr-121.159","jurisdiction":"us","citation":"14 CFR 121.159","heading":"Single-engine airplanes prohibited.","body":"No certificate holder may operate a single-engine airplane under this part.","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 H—Aircraft 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":"4aeb12d1427d6574752c28801a9ce8c259d3a50b0ba26c78cec45af9f896e3b2","source_id":"us-cfr","stale":true,"prev":"us/14-cfr-121.157","next":"us/14-cfr-121.161"},"notice":"GroundRules: Original legal text. Not legal advice."}