Sec. 25.697 - Lift and drag devices, controls.
(a) Each lift device control must be
designed so that the pilots can place the device in any takeoff, en route,
approach, or landing position established under §25.101(d). Lift and drag
devices must maintain the selected positions, except for movement produced
by an automatic positioning or load limiting device, without further
attention by the pilots.
(b) Each lift and drag device control
must be designed and located to make inadvertent operation improbable.
Lift and drag devices intended for ground operation only must have means
to prevent the inadvertant operation of their controls in flight if that
operation could be hazardous.
(c) The rate of motion of the surfaces
in response to the operation of the control and the characteristics of the
automatic positioning or load limiting device must give satisfactory
flight and performance characteristics under steady or changing conditions
of airspeed, engine power, and airplane attitude.
(d) The lift device control must be
designed to retract the surfaces from the fully extended position, during
steady flight at maximum continuous engine power at any speed below VF
[Amdt. 25-23, 35 FR 5675, Apr. 8, 1970, as
amended by Amdt. 25-46, 43 FR 50595, Oct. 30, 1978; Amdt. 25-57, 49 FR
6848, Feb. 23, 1984]