32-36-02
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
BOLT (4 LOCATIONS)
A
SUPPORT ASSEMBLY
A
UNLOCK SWITCH
ACTUATOR
UPLOCK RELEASE MECHANISM
C
33
2
2
A-A
2 0.004 INCH CLEARANCE (MAXIMUM).
THE CLEARANCE CAN OCCUR AT THE
TOP OR THE LOWER SURFACE OF THE
BUSHING.
3
REFERENCE ONLY. FOR SPECIFIC
PART NUMBER, LENGTH AND MATERIAL
REFER TO CURRENT AIPC.
Alternate Extension System for the Wing Gear Figure 401 (Sheet 2)
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32-36-02
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
TASK 32-36-02-404-005
3. Installation of the Uplock Release Mechanism for the Wing Gear
______________________________________________________________
A. References
(1)
32-36-01/401, Wing Gear Alternate Extension System Electric Actuator
(2)
32-36-02/501, Wing Gear Alternate Extension System Uplock Release Mechanism
(3)
IPC 32-36-02 Fig. 1
(4)
SSM 32-35-02
(5)
WDM 32-35-12
B.
Access
(1)
Location Zones
135 Wing Landing Gear Wheel Well, LH
136 Wing Landing Gear Wheel Well, RH
C.
Installation of the Uplock Release Mechanism (Fig. 401)
S 424-016
(1) Put the uplock release mechanism in its position on the structure and install the fasteners.
NOTE: Make sure the maximum clearance at the top or the lower
____ surface of the bushing is not more than 0.004 inches (View A-A, Fig. 401).
S 434-019
(2)
Connect the door unlock switch at junction box J71 (J72 RH side) and connect the electrical cable clamps.
S 434-017
(3)
Connect the cables for alternate extension of the wing gear, LGDR-3A and -3B (LGDR-4A and -4B, RH), to the cable quadrant in the uplock release mechanism.
S 824-018
CAUTION: MAKE SURE THE INTERNAL TEMPERATURE OF THE AIRPLANE STAYED WITH
_______ 10°F OF THE EXTERNAL TEMPERATURE FOR A MINIMUM OF 1 HOUR BEFORE YOU ADJUST THE CABLES.
(4)
Adjust the tension the cables LGDR-3A and -3B (LGDR-4A and -4B, RW) to the value shown in Fig. 402.
S 414-007
(5)
Install the electrical actuator for alternate extension of the left (right) wing gear (Ref 32-36-01/401).
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A
747-400
MAINTENANCE MANUAL
CABLE TENSION (POUNDS)
120
110
100
90
80
70
60
50
40
AMBIENT TEMPERATURE (`F)
Cable Tension for the Alternate Extension System Figure 402
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747-400 MAINTENANCE MANUAL
S 714-008
(6) Do a test of the uplock mechanism for alternate extension of the left (right) wing gear and put the airplane back to its usual condition (Ref 32-36-02/501).
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