(a)
Install a wooden strut between the door and body to keep the door in this position.
(b)
Lower the crane until you can disconnect the cables from the lift brackets.
(c)
Move the sling away from door and remove it the crane.
(d)
Remove the forward spreader beam from the sling and install it on crane.
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A
747-400
MAINTENANCE MANUAL
S 494-032
(5) Lift the forward spreader beam with crane until you can attach the cables to the forward lift brackets.
S 864-003
WARNING: DO NOT EXCEED THE FULL OPEN POSITION OR POSSIBLE
_______ STRUCTURAL DAMAGE WILL OCCUR. DOOR SHOULD BE SUPPORTED IN THIS POSITION BY ADDITIONAL MEANS TO PREVENT DOOR DAMAGE AND INJURY TO PERSONNEL IF INADVERTENTLY RELEASED BY CRANE.
(6)
Lift the nose cargo door to the fully open position and remove wooden strut.
S 434-034
(7)
Tighten nuts on the large hinge bolts 2000 to 2400 pound-inches.
S 434-035
(8)
Install the small hinge bolt.
(a)
Tighten nuts with your hand and then loosen them to the first castellation and install the cotter pins.
H.
Put The Airplane Back To It Usual Condition
S 434-041
(1)
Connect the control pushrods to the hinge access doors (AMM
52-31-12/401).
S 094-036
(2)
Remove the sling from the nose cargo door.
(a)
Remove the auxiliary door support.
(b)
Lower the door with the crane until the push-pull cam touches the rollers.
(c)
Remove sling from door.
S 094-037
(3)
Remove four lift brackets and install the countersink screws and plugs on the sling attachment points.
S 434-039
(4)
Connect the electrical bonding straps adjacent to the hinge fittings (AMM 20-11-14/701).
(5)
Connect the door electrical wires.
S 434-040
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747-400 MAINTENANCE MANUAL
I. Nose Cargo Door Adjustment and Test S 834-042
(1) Do an adjustment and test of the nose cargo door (AMM 52-31-00/501).
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747-400 MAINTENANCE MANUAL
NOSE CARGO DOOR HINGE - INSPECTION/CHECK
________________________________________
1. General_______
A. This procedure only has illustrations and data for the wear limits of the components on the door hinges. For the removal and installation of a damaged component, refer to AMM 52-31-01/401.
TASK 52-31-01-706-001
2. Nose Cargo Door Hinge Examination__________________________________
A. Access
(1)
Location Zone
211 Main deck portal to STA 488, LH
212 Main deck portal to STA 488, RH
(2)
Access Panel
801 Door - Nose Cargo
B.
Procedure
(1)
See Figure 601.
S 226-002
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