14 CFR § 29.1159
Supercharger controls
July 13, 2020
Each supercharger control must be accessible to—
(a) The pilots; or
(b) (If there is a separate flight engineer station with a control panel) the flight engineer.
Each supercharger control must be accessible to—
(a) The pilots; or
(b) (If there is a separate flight engineer station with a control panel) the flight engineer.