(b)
Remove the sensor mounting nut (2).
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A
747-400
MAINTENANCE MANUAL
SEE A
CONDUIT
A
A
TERMINAL JUNCTION
1. SHIM BRACKET HOOK UPLOCK T382 RIGHT) (T379 LEFT, BOARD J21 RIGHT) (J18 LEFT, BOX
OUTBD FWD SEE B
4. CONDUIT A
NUTS
5. NUT
6. LOCK
2. SENSOR WASHER
1. SHIM NUTS MOUNTING 7. WASHER
3. SENSOR 8. TERMINAL LUG
TARGET (ALTERNATE UPLOCK
SENSOR;
S1638 LEFT,
3. SENSOR S1639 RIGHT)
(PRIMARY UPLOCK
SENSOR;
INCH CLEARANCE 0.05 |0.01 S398 LEFT, S404 RIGHT)
J BOX
A-A
TERMINAL
STRIP
B
Wing Gear Uplock Sensor
Figure 201
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A
747-400 MAINTENANCE MANUAL
(c) Carefully pull the sensor wires from the conduit and remove the line from the wire ends.
NOTE: Do not pull the line fully out of the conduit.
____
(d) Remove the sensor (3) from the airplane.
TASK 32-61-21-402-009
3. Install the Uplock Sensor for the Wing Gear___________________________________________
A. Consumable Materials
(1)
A00704 Sealant - Silicone, RTV 162
(2)
B00083 Solvent - Aliphatic Naphtha, TT-N-95, Type 2
(3)
C00582 Primer - SS-4004
B. Parts ~.............................................................................. | AMM | | AIPC | ................. ...........................| | FIG | ITEM | NOMENCLATURE | SUBJECT | FIG | ITEM | ...............................................................................| | 201 | 1 | Shim | 32-61-02 | 02 | 50 | | | 2 | Sensor Mounting Nuts | | | 35 | | | 3 | Sensors | | | 45 | 2......…........…...................................…..........….......….......1
C. References
(1)
24-22-00/201, Manual Control
(2)
32-09-02/201, Air/Ground Relay System
(3)
32-09-03/501, Proximity Switch Electronics Unit
(4)
IPC 32-61-02, Fig. 2
(5)
WDM 32-61-14, Left Wing Gear Primary Display
WDM 32-61-17, Right Wing Gear Primary Display
(6)
WDM 32-61-23, Left Wing Gear Alternate Display
WDM 32-61-26, Right Wing Gear Alternate Display
D.
Access
(1)
Location Zone
135 Wing Landing Gear Wheel Well, LH
136 Wing Landing Gear Wheel Well, RH
E.
Install the Uplock Sensor (Fig. 201)
S 432-010
(1)
Twist the sensor wires together and attach the line that you kept in the conduit (during the removal).
(a)
Carefully pull the sensor wires through the conduit.
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A 747-400 MAINTENANCE MANUAL
S 422-011
(2) Install the uplock sensor (3): (a) Install the sensor with the mounting nut (2).
NOTE:____ If the sensor bracket or the shims are not damaged or removed, then no sensor adjustment is necessary. But if the bracket or the shims are been damaged or replaced, you must adjust the sensor (Refer to the task to Adjust the Wing Gear Uplock Sensor).
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