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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL

SIDE CARGO
DOOR SLING

Side Cargo Door Sling
Figure 402

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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747-400 MAINTENANCE MANUAL
 TASK 52-32-08-404-008
 3.  Hinge Sections - Installation_____________________________
 A. Special Tools and Equipment
 (1)  
Sling, Side Cargo Door-20HME65B17601 (Necessary to install hinge sections with the same pin)

 B.
Consumable Materials

 (1)  
A00247 Sealant - BMS 5-95

 (2)  
D00013 Grease - MIL-G-23827

 C.
References

 (1)  
52-32-18/401, Rain Seals

 (2)  
52-32-00/001, Side Cargo Door

 (3)  
AIPC 52-32-05 Fig.1, AIPC 52-32-01 Fig.1, AIPC 53-12-78 Fig.1

 D.
Access

 (1)  
Location Zone
 261 Main Deck STA 1720 To STA 2040, LH

 (2)  
Access Panel
 836L Door-Main Deck Cargo

 E.
Procedure

 S 424-009
 (1)  Do these steps to install the hinge sections that have separate hinge pins (Fig. 401):
 WARNING: MAKE SURE THAT PERSONS AND EQUIPMENT ARE AWAY FROM THE
_______ DOOR AND THE DOOR OPENING WHEN YOU OPERATE THE DOOR. FAILURE OF THE LIFT MECHANISM COULD CAUSE THE DOOR TO CLOSE QUICKLY WHICH COULD CAUSE INJURY OR DAMAGE.
 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 cargo door sufficiently to get access to the bolt heads on the upper door beam and the fuselage upper sill.

 (b)  
Lubricate the hinge pins with grease.

 (c)  
Install the hinge pins.

 (d)  
Put a layer of sealant between the shim and the hinge section.

 (e)  
Put the hinge section in its position, with the hinge pin and the shims installed, to align the holes in each hinge segment with the mating holes in the door and fuselage (View A-A and B-B).

 NOTE: You must install the shims in the same initial position.
____
 (f)  Install the bolts.
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747-400 MAINTENANCE MANUAL
 (g)  Tighten the bolts to the subsequent torques (Fig. 401): 1) Bolt (1) - 290 to 410 pound-inches 2) Bolt (2) - 660 to 780 pound-inches 3) Bolt (3) - 100 to 150 pound-inches 4) Bolt (4) - 50 to 80 pound-inches 5) Bolt (5) - 5/16-24 Bolts 60 to 85 pound-inches
 -
3/8-24 Bolts 95 to 110 pound-inches 6) Bolt (6) - 5/16-24 Bolts 100 to 150 pound-inches

 -
3/8-24 Bolts 50 to 80 pound-inches

 (h)  
Inject the sealant between the hinge sections until the clearances between the hinge sections are full.

 (i)  
Apply a fillet seal of sealant to the top and bottom edges of the hinge section. Make sure the fillet seal touches the injected seal.

 S 424-010
 (2)  
Do these steps to install hinge sections that have the same hinge pins:

 (a)  
Install the door sling on the side cargo door (Fig. 402).

 (b)  
While the sling keeps weight off the hinges, manually unlatch and open the door.

 NOTE: Only open the door far enough to get at the hinge
____
 fastener holes.

 (c)  
Make sure the hinge section has the hinge pin and shims installed.

 (d)  
Lubricate the hinge pin with grease if it is not installed.
　
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