Flight time limitations: Flight engineers and flight navigators.
CFR · 2024-01-01 · US · Title 14
(a) In any operation in which one flight engineer or flight navigator is required, the flight time limitations in § 121.483 apply to that flight engineer or flight navigator. (b) In any operation in which more than one flight engineer or flight navigator is required, the flight time limitations in § 121.485 apply to those flight engineers or flight navigators.
official document · source cfr-2024 · id 14:§ 121.493