Control Locks - Cessna 172R Pilot Operating Handbook

SECTION 7
CESSNA
AIRPLANE & SYSTEMS DESCRIPTION
MODEL 172R
Exit from the airplane is accomplished by rotating the door
handle from the LOCK position, past the CLOSE position, aft to the
OPEN position and pushing the door open. To lock the airplane,
lock the right cabin door with the inside handle, close the left cabin
door, and using the ignition key, lock the door.
The left and right cabin doors are equipped with openable
windows which are held in the closed position by a detent equipped
latch on the lower edge of the window frame. To open the windows,
rotate the latch upward. Each window is equipped with a spring
loaded retaining arm which will help rotate the window outward, and
hold it there.
If required, either window may be opened at any
speed up to 163 KIAS. The rear side windows and rear windows are
of the fixed type and cannot be opened.
CONTROL LOCKS
A control lock is provided to lock the aileron and elevator control
surfaces to prevent damage to these systems by wind buffeting
while the airplane is parked. The lock consists of a shaped steel rod
and flag. The flag identifies the control lock and cautions about its
removal before starting the engine. To install the control lock, align
the hole in the top of the pilot's control wheel shaft with the hole in
the top of the shaft collar on the instrument panel and insert the rod
into the aligned holes. Installation of the lock will secure the ailerons
in a neutral position and the elevators in a slightly trailing edge
down position. Proper installation of the lock will place the flag over
the ignition switch. In areas where high or gusty winds occur,
a
control surface lock should be installed over the vertical stabilizer
and rudder. The control lock and any other type of locking device
should be removed prior to starting the engine.
7-18
Dec 2/96