{"data":{"id":"us/14-cfr-121.440","jurisdiction":"us","citation":"14 CFR 121.440","heading":"Line checks.","body":"(a) No certificate holder may use any person nor may any person serve as pilot in command of an airplane unless, within the preceding 12 calendar months, that person has passed a line check in which he satisfactorily performs the duties and responsibilities of a pilot in command in one of the types of airplanes he is to fly.\n(b) A pilot in command line check for domestic and flag operations must—\n(1) Be given by a check pilot who is currently qualified on both the route and the airplane; and\n(2) Consist of at least one flight over a typical part of the certificate holder's route, or over a foreign or Federal airway, or over a direct route.\n(c) A pilot in command line check for supplemental operations must—\n(1) Be given by a check pilot who is currently qualified on the airplane; and\n(2) Consist of at least one flight over a part of a Federal airway, foreign airway, or advisory route over which the pilot may be assigned.","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 O—Crewmember Qualifications"],"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":"8a0ddeba70f02ddb25b19067d83d0f4994f30a6cc9af12c9025557099d673f88","source_id":"us-cfr","stale":true,"prev":"us/14-cfr-121.439","next":"us/14-cfr-121.441"},"notice":"GroundRules: Original legal text. Not legal advice."}