View all text of Subpart S [§ 121.500 - § 121.527]
§ 121.507 - Flight time limitations: Three pilot crews: airplanes.
(a) No certificate holder conducting supplemental operations may schedule a pilot—
(1) For flight deck duty in an airplane that has a crew of three pilots for more than eight hours in any 24 consecutive hours; or
(2) To be aloft in an airplane that has a crew of three pilot for more than 12 hours in any 24 consecutive hours.
(b) No pilot of an airplane that has a crew of three pilots may be on duty for more than 18 hours in any 24 consecutive hours.