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LATCH FITTING (EXAMPLE)
LATCH MECHANISM
SEE C
HANDLE
MECHANISM

CONTROL CAM
LOWER GATE
A
747-400 MAINTENANCE MANUAL
UPPER GATE
DOORSTOP (EXAMPLE)
DOOR TORQUE TUBE
SEE A
BODY TORQUE TUBE
SEE B
FWD
DOOR 1
LATCH MECHANISM
SEE C
HANDLE MECHANISM
CONTROL CAM
LOWER GATE
DOOR 5 Main Entry Door Mechanisms Figure 601 (Sheet 1)
UPPER GATE
DOORSTOP (EXAMPLE)
DOOR TORQUE TUBE
SEE A
BODY TORQUE TUBE
SEE B
C71649
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A
747-400
MAINTENANCE MANUAL

UPPER SHAFT UPPER HINGE ARM
CRANK
CONTROL ROD
BEARING 
ASSEMBLY  HINGE 
CENTER  UPPER ARM 
SHAFT 
COUPLING 

BEARING
UPPERLOWER SHAFTSHAFT LOWER GUIDE
HINGE ARM ARM
BEARING
ASSEMBLY

GUIDE ARM
UPPER AND LOWER COUPLING
DOOR TORQUE TUBE (DOOR 1)
CRANKCONTROL ROD
A
LOWER
SHAFT
BEARING
LOWER HINGE ARM
DOOR TORQUE TUBE (DOOR 5) A
Main Entry Door Mechanisms Figure 601 (Sheet 2)
C71650
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A
747-400
MAINTENANCE MANUAL

UPPER UPPER
HINGE ARM LINK
BELLCRANK LINK
TELESCOPIC SLEEVE GUIDEUPPER
ARMUPPERBEARING HINGE ARMPLATE GUIDE
PLATE ROTARY SNUBBER
RELEASE LEVER
ANCHORPLATE ANCHORPLATE ASSEMBLY UPPER
HOLD-OPEN SLEEVE
COLLAR
HOLD-OPEN COMPRESSION FITTING SPRING
RELEASE HANDLE ROTARY SNUBBER
SPROCKET 
SHAFT  LOWER SLEEVE 
LOWER 
BEARING PLATE 
GUIDE 
PLATE 
LOWER 
LOWER  HINGE 
HINGE  ARM  LOWER LINK 
ARM 

GUIDE PLATE
FWD BELLCRANKGUIDE ARM
BODY TORQUE TUBE (DOOR 5) B
LINK BODY TORQUE TUBE (DOOR 1)
B
Main Entry Door Mechanisms Figure 601 (Sheet 3)
C71979
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A
747-400
MAINTENANCE MANUAL

UPPER GATE  TORQUE TUBE 
CRANK 
GATE CONTROL ROD 
TORQUE TUBE 
CONTROL ROD 
LATCH  CONTROL ROD 
CRANK 
COCKING CRANK 
LATCH ROLLER 
(EXAMPLE) 
CONTROL ROD 
TORQUE TUBE CRANK 
TORQUE TUBE  LOWER GATE 
GATE CONTROL ROD 
LATCH MECHANISM 
C 
Main Entry Door Mechanism 
Figure 601 (Sheet 4) 

C71980
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A 747-400 MAINTENANCE MANUAL
 S 016-014
 (3)  Remove the maintenance access panel, forward of the door, on the outer fuselage of the airplane.
 S 016-015
 (4)  Remove the hinge covers from the inner side of the door.
　
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