Landing Gear Position Indicator Lights; Landing Gear Operation; Emergency Hand Pump - Cessna TR182 1979 Pilot Operating Handbook

SECTION 7
AIRPLANE
&
SYSTEMS DESCRIPTIONS
CESSNA
MODELTR182
right of the electrical switches. The lever has two positions, labeled GEAR
UP and GEAR DOWN, which give a mechanical indication of the gear
position selected. From either position, the lever must be pulled out to
clear a detent before it can be repositioned; operation of the landing gear
system will not begin until the lever has been repositioned. After the lever
has been repositioned, it directs hydraulic pressure within the system to
actuate the gear to the selected position.
LANDING GEAR POSITION INDICATOR LIGHTS
Two position indicator lights, adjacent to the landing gear control
lever, indicate that the gear is either up or down and locked. Both the gear-
up (amber) and gear-down (green) lights are the press-to-test type,
incorporating dimming shutters for night operation. If an indicator light
bulb should burn out,
it
can be replaced in flight with the bulb from the
remaining indicator light.
LANDING GEAR OPERATION
To retract or extend the landing gear, pull out on the gear lever and
move it to the desired position. Aftflr the lever is posi tionod,
the power pack
will create pressure in the system and actuate the landing gear to the
selected position. During a normal cycle, the gear stops full up or locks
down, limit switches close, and the indicator light comes on (amber for up
and green for down) indicating completion of the cycle. After indicator
light illumination, the power pack will continue to run until the fluid
pressure reaches 1500 PSI, opens the pressure switch, and turns the power
pack off. Whenever fluid pressure in the system drops below 1000PSI, the
pressure switch will close and start power pack operation, except when the
nose gear safety (squat) switch is open.
The safety (squat) switch, actuated by the nose gear, electrically
prevents inadvertent retraction whenever the nose gear strut is com-
pressed by the weight of the airplane. When the nose gear is lifted off the
runway during takeoff, the squat switch will close, which may cause the
power pack to operate for 1 or 2 seconds and return the system pressure to
1500 PSI in the event pressure has dropped below 1000 PSI. A push-pull
type circuit breaker switch is also provided in the system as a maintenance
safety feature. With the switch pulled out, landing gear operation is
prevented. After maintenance is completed, and prior to flight, the switch
should be pushed back in.
EMERGENCY HAND PUMP
A hand-operated hydraulic pump, located between the front seats, is
provided for manual extension of the landing gear in the event of a
hydraulic system failure. The landing gear cannot be retracted with the
7-12 1 October 1978