14 C.F.R. § 29.1147 Mixture controls.
Title 14 - Aeronautics and Space
(a) If there are mixture controls, each engine must have a separate control, and the controls must be arranged to allow— (1) Separate control of each engine; and (2) Simultaneous control of all engines. (b) Each intermediate position of the mixture controls that corresponds to a normal operating setting must be identifiable by feel and sight.
Title 14: Aeronautics and Space
PART 29—AIRWORTHINESS STANDARDS: TRANSPORT CATEGORY ROTORCRAFT
Subpart E—Powerplant
Powerplant Controls and Accessories
§ 29.1147 Mixture controls.
