Cockpit controls must be designed so that they operate in accordance
with the following movements and actuation:
(a) Flight controls, including the collective pitch control, must
operate with a sense of motion which corresponds to the effect on the
rotorcraft.
(b) Twist-grip engine power controls must be designed so that, for
lefthand operation, the motion of the pilot's hand is clockwise to
increase power when the hand is viewed from the edge containing the index
finger. Other engine power controls, excluding the collective control,
must operate with a forward motion to increase power.
(c) Normal landing gear controls must operate downward to extend the
landing gear.