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H48630
A

747-400
MAINTENANCE MANUAL

CARGO DOOR 
JUNCTION BOX 
LIFT 
MECHANISM 
DOOR 
ATTACHMENT 

LOWER CARGO DOOR
(EXAMPLE)

LATCH FITTING (4 LOCATIONS)
SEE B
LATCH MECHANISM
SEE A
Latch Mechanism/Latch Fitting Adjustment
Figure 503 (Sheet 1)

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H48651
A
747-400
MAINTENANCE MANUAL

MIDSPAN MIDSPAN
LATCH LATCH
CAM PUSHROD
PUSHROD
(2 LOCATIONS) (2 LOCATIONS)

(2 LOCATIONS)
BELLCRANK LOWER LATCH LOWER LATCH
A
(2 LOCATIONS) PUSHROD CAM (8 LOCATIONS) (4 LOCATIONS)

FWD

LATCH MECHANISM

A-A

Latch Mechanism/Latch Fitting Adjustment
Figure 503 (Sheet 2)

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A 747-400 MAINTENANCE MANUAL
MIDSPAN 0.045
INCH

Latch Mechanism/Latch Fitting Adjustment
Figure 503 (Sheet 3)

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747-400
MAINTENANCE MANUAL

D-D
THE LATCH PIN IS 0.002 INCH. SECTION C-C SHOWS THE USE OF A DUMMY LATCH PIN TO GET THE NECESSARY CLEARANCE. (IF AVAILABLE)
Latch Mechanism/Latch Fitting Adjustment Figure 503 (Sheet 4)
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747-400
MAINTENANCE MANUAL

CARGO DOOR 
JUNCTION BOX 
LIFT 
MECHANISM 
DOOR 
ATTACHMENT 
DOOR 
RESTRAINT 
MECHANISM 
(AFT) 
SEE  A 
DOOR 
RESTRAINT 
MECHANISM 
(FORWARD) 
SEE  A 

LOWER CARGO DOOR
(EXAMPLE)

Door Restraint Mechanism
Figure 504 (Sheet 1)

H48740
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MAINTENANCE MANUAL

Door Restraint Mechanism
Figure 504 (Sheet 2)

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