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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.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