S 034-046
(9)
Disconnect the electrical wires.
S 034-047
(10)
Disconnect the bonding straps adjacent to the hinge fittings.
S 034-048
(11)
Remove the two door linear actuators (AMM 52-31-02/401).
S 494-049
(12)
Attach sling to the nose cargo door and crane as shown in Fig. 402.
(a)
Install the sling over the door.
(b)
Attach the cables from the sling to the lift brackets.
F.
Nose Cargo Door Removal
S 984-060
CAUTION: DO NOT ALLOW DOOR TO OSCILLATE THE LIFT CABLES MORE THAN | 5
_______ DEGREES FROM THE VERTICAL. THIS CAN CAUSE DAMAGE TO THE LIFT FITTINGS ON THE ATTACHMENT PADS.
(1)
Slowly lift the sling to support the door and to remove the cable slack.
(a)
Make sure the door weight distributes equally on each lift cable.
(b)
Move the crane, if it is necessary, to make sure the lift cable angle is not more than 5 degrees in any direction from the vertical position.
S 864-043
WARNING: DO NOT OPEN THE DOOR BEYOND THE FULLY OPEN POSITION OR POSSIBLE
_______ STRUCTURAL DAMAGE WILL OCCUR. DOOR MUST BE SUPPORTED IN THIS POSITION BY ADDITIONAL MEANS TO PREVENT DOOR DAMAGE AND INJURY TO PERSONS IF IT IS ACCIDENTALLY RELEASED BY CRANE.
WARNING:_______DO NOT FORCE THE HINGE BOLTS FROM HINGES. IT CAN CAUSE THE DOOR MOVES SUDDENTLY. THIS CAN CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
(2)
Remove the hinge bolts, shims, washers and nuts.
(a)
Install the thread protector on the large hinge bolt.
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52-31-01
ALL ú ú 02 Page 408 ú Jun 10/97
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
(b)
Move the crane, as necessary, until you can remove the large hinge bolt freely.
(c)
Mark the hinge bolts, nuts, washers and shims on each side of hinge bearing to make sure the hinge bolts, nuts, washers, and shims are installed in the same places.
S 024-053
(3)
Remove the nose cargo door from the airplane.
S 494-054
(4)
Install safety barrier across the door opening.
TASK 52-31-01-404-002
3. Nose Cargo Door Installation (Fig. 401)____________________________
A. Special Tools and Equipment
(1)
Crane (Overhead) - 4500-pound minimum lift capacity
(2)
MIT65B12349 - Thread Protector, Hinge Bolt
(3)
MIT65B80430 - Alternate Drive Extension, Nose Cargo Door Lift Actuator
(4)
PRE65B13015 - Safety Barrier, Nose Cargo Door
(5)
20HME65B13015 - Sling, Nose Cargo Door
B.
Standard Tools and Equipment
(1)
Adapter - 0.250-Inch Hex to 0.375-Inch Square Tang, Model CP-S-75350Y, Chicago Pneumatic Company, or Equivalent
C.
Consumable Materials
(1)
D00013 Grease - MIL-G-23827
D.
References
(1)
20-11-14/701, Metal Surfaces
(2)
52-31-00/501, Nose Cargo Door
(3)
52-31-01/601, Nose Cargo Door
(4)
52-31-02/401, Nose Cargo Door Linear Actuator
(5)
52-31-12/401, Nose Cargo Door Hinge Access Clearance Door
E.
Access
(1)
Location Zones
801 Nose Cargo Door
(2)
Access Panels
221BR Door Hinge Access, Right
221BL Door Hinge Access, Left
F.
Prepare For Installation
S 214-017
(1)
Make sure the push-pull cam and push-pull cam actuator are in the extended open position.
S 214-018
(2)
Do a visual check of all 21 portal and door latch fittings to make sure that there is no possible interference when the door is closed.
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本文链接地址：747-400 AMM 飞机维护手册 舱门 DOORS 2(30)
