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At the end of the door lift movement, the lift lock cam moves up against the lift pin. This locks the upper lift link, door, lower lift link, and hinge link into a rigid parallelogram. It also holds the door in the lifted (unlatched) position.
The hinge link, adjustment rod, hinge arm, and scissor arm form a parallelogram that is not rigid. As the rotary actuator moves the hinge arm, the programming rod controls the shape of the parallelogram. The shape changes causes the door to move outward and the bottom of the door rotates upward.
EFFECTIVITY BEJ ALL  52-35-00 
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AFT SMALL CARGO DOOR SYSTEM -HINGE ARM -FUNCTIONAL DESCRIPTION

EFFECTIVITY BEJ ALL  52-35-00 
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D633W101-BEJ  Jan 05/2002 

AFT SMALL CARGO DOOR SYSTEM -PROXIMITY SENSORS

Purpose
Proximity sensors supply door and door mechanism position information to the proximity sensor electronics unit (PSEU) for door operational control and door status indications.
Physical Description
The sensors are electrical devices that work with metal targets.
Location
The sensors are on the door. Targets are on the door and on structure around the door.
Functional Description
These sensors are for door operational control:
*
Door up (open)

*
Door down

*
Door lifted

*
Door latched. These sensors are for door status indications:

*
Door closed

*
Door latched and locked.

See the door warning system section for more information on the door status sensors (SECTION 52-71).
Each sensor has a related target. The sensor senses if the target is near or far. The position information goes to the PSEU.
The door operation control sensors tell the PSEU the position of the door and door mechanisms. The PSEU uses the information to control the cargo door operation and the door control panel indication lights.
EFFECTIVITY BEJ ALL  52-35-00 
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D633W101-BEJ  Sep 05/2002 

 

AFT SMALL CARGO DOOR SYSTEM -PROXIMITY SENSORS

EFFECTIVITY BEJ ALL  52-35-00 
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D633W101-BEJ  Jan 05/2002 

AFT SMALL CARGO DOOR SYSTEM -CONTROL SWITCHES

Purpose
Control switches let you arm and operate the door electrically.
Location
The switches are on the P44 aft cargo door control panel, and in the ceiling of the cargo compartment.
Physical Description
The internal and external toggle type door control switches are spring-loaded.
Functional Description
You can use either the external or internal switches to arm and operate the door electrically. The internal switches have priority over the external switches.
EFFECTIVITY BEJ ALL  52-35-00 
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D633W101-BEJ  Jan 05/2002 

 

AFT SMALL CARGO DOOR SYSTEM -CONTROL SWITCHES

EFFECTIVITY BEJ ALL  52-35-00 
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D633W101-BEJ  Jan 05/2002 

AFT SMALL CARGO DOOR SYSTEM -ELECTRICAL OPERATION

General
The aft small cargo door uses power from the ground handling bus for electrical operation.
WARNING: DO NOT OPERATE THE DOOR IN WINDS MORE THAN 40 KNOTS. DO NOT LET THE DOOR STAY OPEN IN WINDS MORE THAN 65 KNOTS. INJURIES TO PERSONS OR DAMAGE TO EQUIPMENT CAN OCCUR.
WARNING: DO NOT OPEN THE DOOR WHEN THE AIRPLANE IS PRESSURIZED. INJURIES TO PERSONS OR DAMAGE TO EQUIPMENT CAN OCCUR.
Controls
There are door operation switches on the P44 and in the ceiling of the cargo compartment. There are two switches at each location. One is the door control arming switch. The other is the door control open/close switch. The internal switches have priority over the external switches.
　
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