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Close and Latch Operation
CAUTION:  MAKE SURE THE E/E EQUIPMENT DOORS ARE CLOSED ON THE SIDES OF THE DOOR CUTOUT BEFORE YOU CLOSE THE DOOR. THE CARGO DOOR CAN CAUSE DAMAGE TO OPEN E/E EQUIPMENT DOORS WHEN IT CLOSES.
Move either the external or the internal switch to the close position. The amber door up light goes off when the door leaves the full up position.
Continue to hold the switch in the close position. The door goes to the full down position. Then it latches. The green door closed and latched light comes on.
Lock Operation
Close the lock handle. Make sure that the vent door closes. The door is locked if the vent door is closed.
Training Information Point
Look through each witness port along the bottom edge of the door for latch and lock indications. The latch and lock components are black. The indications and target are yellow.
The door is latched if the indication arrow on each latch cam points to the target on each latch fitting. The door is locked if you see all of the door locked circle on each lock pawls.
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FORWARD LARGE CARGO DOOR SYSTEM -ELECTRICAL OPERATION

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FORWARD LARGE CARGO DOOR SYSTEM -MANUAL OPERATION

General
Use a 3/8 inch drive tool for manual door operations.
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
The cargo door lock handle covers the latch manual drive socket. Release lock handle to access the socket.
There are two lift manual drive sockets on the upper, forward corner of the cargo door.
Indications
Witness ports along the bottom edge of the door let you see if the door is latched and locked.
Unlock and Unlatch Operations
WARNING: STAY AWAY FROM THE PATH OF THE LOCK HANDLE. THE LOCK HANDLE IS SPRING-LOADED TO OPEN WHEN YOU PULL THE CATCH RELEASE LEVER AND INJURIES TO PERSONS OR DAMAGE TO EQUIPMENT CAN OCCUR.
Release the lock handle. If the vent door opens, the door is unlocked.
Insert the drive tool into the latch manual drive socket. Turn it in the unlatch direction. The door is unlatched when it moves outboard to where you can move it freely a small distance inboard and outboard, approximately 120 full turns.
NOTE: The lower edge of door will move 2-3 inches (5-8 cm) outboard.
Lift and Lower Operations
CAUTION:  DO NOT LET THE POWER DRIVE UNIT OPERATE WITH TORQUE LIMITER SLIPPAGE FOR MORE THAN 5 SECONDS. DAMAGE TO THE POWER DRIVE UNIT CAN OCCUR. DO NOT OPERATE THE MANUAL DRIVE AT A SPEED FASTER THAN 500 RPM OR A TORQUE OF MORE THAN 110 POUNDS-INCHES. DAMAGE TO THE MANUAL DRIVE CAN OCCUR.
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FORWARD LARGE CARGO DOOR SYSTEM -MANUAL OPERATION

Insert the drive tool in the lift manual drive socket on the outside of the door. Turn it in the open direction, approximately 320 full turns. When the door is open sufficiently, move the tool to the lift manual drive socket on the forward edge of the door. Turn it in the open direction until the door is in the full up position, approximately 1150 full turns.
NOTE: It is usual for the door to stop at the low point of its travel.
CAUTION:  MAKE SURE THE E/E EQUIPMENT DOORS ARE CLOSED ON THE SIDES OF THE DOOR CUTOUT BEFORE YOU CLOSE THE DOOR. THE CARGO DOOR CAN CAUSE DAMAGE TO OPEN E/E EQUIPMENT DOORS WHEN IT CLOSES.
　
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