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§ 25.779
Motion and effect of cockpit controls.
Cockpit controls must be designed so that they operate in accordance with the following movement and actuation:
(a) Aerodynamic controls:
(1) Primary.
Controls
Motion and effect
Aileron
Right (clockwise) for right wing down.
Elevator
Rearward for nose up.
Rudder
Right pedal forward for nose right.
(2) Secondary.
Controls
Motion and effect
Flaps (or auxiliary lift devices)
Forward for flaps up; rearward for flaps down.
Trim tabs (or equivalent)
Rotate to produce similar rotation of the airplane about an axis parallel to the axis of the control.
(b) Powerplant and auxiliary controls:
(1) Powerplant.
Controls
Motion and effect
Power or thrust
Forward to increase forward thrust and rearward to increase rearward thrust.
Propellers
Forward to increase rpm.
Mixture
Forward or upward for rich.
Carburetor air heat
Forward or upward for cold.
Supercharger
Forward or upward for low blower. For turbosuperchargers, forward, upward, or clockwise, to increase pressure.
(2) Auxiliary.
Controls
Motion and effect
Landing gear
Down to extend.
[Doc. No. 5066, 29 FR 18291, Dec. 24, 1964, as amended by Amdt. 25-72, 55 FR 29778, July 20, 1990]