Textron Cessna Grand Caravan Ex 208B Pilot's Operating Handbook And Faa Approved Airplane Flight Manual page 509

CESSNA
MODEL 208B 867 SHP
GARMIN G1000
CONTROL LOCKS
The Rudder Gust Lock has a fail-safe connection to the elevator control
system to ensure that it will always be disengaged before the airplane
becomes airborne. This fail-safe connection automatically disengages
the lock when the elevator is deflected upward about one-fourth of its
travel from neutral. The pilot is responsible for disengaging the Rudder
Gust Lock during the preflight inspection and operating the fail-safe
disengagement mechanism by momentarily deflecting the elevator to
the full up position after the control lock is removed and before starting
the engine. If these procedures are not followed the rudder and rudder
pedals will be locked in the neutral position making ground steering
impossible. In the event that the engagement of the Rudder Gust Lock
goes completely unnoticed and the pilot commences a takeoff run with
the rudder system locked, the upward elevator deflection during
rotation will disengage the Rudder Gust Lock.
Because of the fail-safe system, the elevator lock should always be
engaged prior to engaging the Rudder Gust Lock when securing the
airplane after shutdown.
The control lock and any other type of locking device should
be removed or unlocked prior to starting the engine.
208BPHCUS-00
AIRPLANE AND SYSTEMS DESCRIPTION
(Continued)
NOTE
SECTION 7
7-45
U.S.