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 CAUTION:_______IN CASE THE DOOR DOES NOT OPEN, STOP IMMEDIATELY. DO NOT OPERATE THE DOOR CONTROL SWITCH. HOLDING THE DOOR CONTROL SWITCH MAY DAMAGE THE ACTUATOR. WAIT AT LEAST 1 MINUTE BEFORE SECOND ATTEMPT. IF THE DOOR STILL DOES NOT OPEN, WAIT AT LEAST 10 MINUTES BEFORE THIRD ATTEMPT.
 (a)  Open the door open approximately one to two feet.
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747-400
MAINTENANCE MANUAL

MIDSPAN
LATCH
TORQUE
TUBE
D
D
AFTMIDSPAN LATCH
FWD OPEN MIDSPAN
D
LATCH OPEN SWITCH
D
SWITCH
LATCHES OPEN SWITCH
A F CE
HOOK 
CLOSED  E  C 
SWITCH 
(2 PLACES)  F  LOWER LATCH 
CAM SHAFT 
A  CLOSED DOOR  LATCHES 
OPEN HOOK  SWITCH  CLOSED SWITCH 
SWITCH 
(2 PLACES) 

Side Cargo Door Sequence Switch Adjustment
Figure 409 (Sheet 1)

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MAINTENANCE MANUAL

HOOK OPEN SWITCH ADJUSTMENT A-A Side Cargo Door Sequence Switch Adjustment Figure 409 (Sheet 2)
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MAINTENANCE MANUAL

LATCHES  MIDSPAN LATCH 
CLOSED  TORQUE TUBE 
SWITCH  SWITCH  FREE POSITION OF SWITCH 
SWITCH  ACTUATOR  PLUNGER (NOT CONTACTING 
MOUNTING  SWITCH ACTUATOR) 
BRACKET 
1.49 1.55 INCHES  1 

1.54
FREE POSITION OF SWITCH INCHES 11.52
PLUNGER (NOT CONTACTING SWITCH ACTUATOR)
SWITCH MOUNTING SWITCH
MIDSPAN LATCH BRACKET ACTUATOR
OPEN SWITCH D-D LOWER LATCH CAM SHAFT C-C
LOCKNUTS SWITCH LATCHES OPEN
DOOR 1.17 INCHES
CLOSED SWITCH 1
FREE POSITION OF SWITCH PLUNGER
1.09 INCHES (NOT CONTACTING SWITCH ACTUATOR)
FREE POSITION OF  LATCHSWITCH
SWITCH PLUNGER (NOT  TORQUEMOUNTING
CONTACTING STRIKING  TUBEBRACKET SURFACE)
LATCH FITTING MOUNTING BRACKET SWITCH ACTUATORDOOR SILL
DOOR F-F
E-E
1PRELIMINARY SWITCH SETTING ONLY, SEE TEXT FOR FINAL SETTING
Side Cargo Door Sequence Switch Adjustment Figure 409 (Sheet 3)
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 (b)  Make sure that the free position of the door closed switch is as shown (View A-A). Adjust it, if it is necessary.
 S 824-041
 (4)  Adjust the hook open switches:
 NOTE: These steps are for the forward and the aft hook open
____
 switches.

 (a)  
Make sure the door is open sufficiently to get access to the hooks.

 (b)  
Turn the manual drive for the hook actuator counterclockwise until the internal stops touch each other (Fig. 402): 1) Use a dial indicator torque wrench to manually turn the

 actuator counterclockwise at 25 |5 pound-inches torque. 2) Manually turn the actuator until the torque increases by 15-20 pound-inches. 3) Turn the manual drive 1/2 turn clockwise.
 NOTE: The internal stops touch at this point.
　
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