14 C.F.R. § 121.511 Flight time limitations: Flight engineers: airplanes.
Title 14 - Aeronautics and Space
(a) In any operation in which one flight engineer is serving the flight time limitations in §§121.503 and 121.505 apply to that flight engineer. (b) In any operation in which more than one flight engineer is serving and the flight crew contains more than two pilots the flight time limitations in §121.509 apply in place of those in §121.505.
Title 14: Aeronautics and Space
PART 121—OPERATING REQUIREMENTS: DOMESTIC, FLAG, AND SUPPLEMENTAL OPERATIONS
Subpart S—Flight Time Limitations: Supplemental Operations
§ 121.511 Flight time limitations: Flight engineers: airplanes.
