Sec. 25.777 - Cockpit controls.
(a) Each cockpit control must be located
to provide convenient operation and to prevent confusion and inadvertent
(b) The direction of movement of cockpit
controls must meet the requirements of §25.779. Wherever practicable, the
sense of motion involved in the operation of other controls must
correspond to the sense of the effect of the operation upon the airplane
or upon the part operated. Controls of a variable nature using a rotary
motion must move clockwise from the off position, through an increasing
range, to the full on position.
(c) The controls must be located and
arranged, with respect to the pilots' seats, so that there is full and
unrestricted movement of each control without interference from the
cockpit structure or the clothing of the minimum flight crew (established
under §25.1523) when any member of this flight crew, from 5&foot;2&inch;
to 6&foot;3&inch; in height, is seated with the seat belt and shoulder
harness (if provided) fastened.
(d) Identical powerplant controls for
each engine must be located to prevent confusion as to the engines they
(e) Wing flap controls and other
auxiliary lift device controls must be located on top of the pedestal, aft
of the throttles, centrally or to the right of the pedestal centerline,
and not less than 10 inches aft of the landing gear control.
(f) The landing gear control must be
located forward of the throttles and must be operable by each pilot when
seated with seat belt and shoulder harness (if provided) fastened.
(g) Control knobs must be shaped in
accordance with §25.781. In addition, the knobs must be of the same color,
and this color must contrast with the color of control knobs for other
purposes and the surrounding cockpit.
(h) If a flight engineer is required as
part of the minimum flight crew (established under §25.1523), the airplane
must have a flight engineer station located and arranged so that the
flight crewmembers can perform their functions efficiently and without
interfering with each other.
[Doc. No. 5066, 29 FR 18291, Dec. 24, 1964, as
amended by Amdt. 25-46, 43 FR 50596, Oct. 30, 1978]