78-36-00
 IDS SOFTWARE.  ú CONFIG 2 ú N01 Page 509 ú Oct 18/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
S 715-110-N02
 (4) Do the operational test of the thrust reverser (AMM 78-31-00/501).
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 78-36-00
 IDS SOFTWARE.  ú CONFIG 2 ú N02 Page 510 ú Oct 18/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
THRUST REVERSER PROXIMITY SENSORS - REMOVAL/INSTALLATION
________________________________________________________
 1.  General
_______
 A.  The thrust reverser proximity sensors are referred to as the proximity sensors in this procedure.
 B.  This procedure has two tasks. The first task gives instructions to remove the proximity sensors. The second task gives instructions to install the proximity sensors.
 TASK 78-36-01-004-020-N00
 2.  Remove the Thrust Reverser Proximity Sensors
____________________________________________
 A.  References
 (1)  
27-62-00/501, Speed Brake Control System

 (2)  
71-11-04/201, Fan Cowl Panels

 (3)  
78-31-00/201, Thrust Reverser System

 (4)  
IPC 78-36-01 Fig. 1

 B.  
Access

 (1)  
Location Zones 415 and 416 Engine 1 - Thrust Reverser Halves 425 and 426 Engine 2 - Thrust Reverser Halves 435 and 436 Engine 3 - Thrust Reverser Halves 445 and 446 Engine 4 - Thrust Reverser Halves

 (2)  
Access Panels
 413 and 414 Fan Cowl Panels - Engine 1
 423 and 424 Fan Cowl Panels - Engine 2
 433 and 434 Fan Cowl Panels - Engine 3
 443 and 444 Fan Cowl Panels - Engine 4

 C.  
Prepare to Remove the Proximity Sensors (Fig. 401).

 S 044-021-N00
 WARNING: DO THE DEACTIVATION PROCEDURE FOR THE AUTOMATIC SPEED BRAKE
_______ CONTROL SYSTEM. IF YOU DO NOT DO THIS, THE AUTOMATIC SPEED BRAKES CAN MOVE QUICKLY WHEN YOU MOVE THE THRUST LEVERS. THIS CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
 (1)  
Do this task: Automatic Speed Brake System Deactivation (Ref 27-62-00/501).

 S 864-022-N00

 (2)  
Make sure the forward thrust levers are in the idle position and attach the DO-NOT-OPERATE tags.

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 78-36-01
 ALL  ú ú N01 Page 401 ú Oct 10/91
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
S 864-023-N00
 (3)  Make sure the reverse thrust levers are in the fully stowed position and attach the DO-NOT-OPERATE tags.
 S 044-024-N00
 WARNING: DO THE THRUST REVERSER DEACTIVATION PROCEDURE TO PREVENT THE
_______
 OPERATION OF THE THRUST REVERSER. THE ACCIDENTAL OPERATION OF
 THE THRUST REVERSER CAN CAUSE INJURIES TO PERSONS OR DAMAGE TO
 EQUIPMENT.

 (4)  
Do this task: Thurst Reverser Deactivation for Ground Maintenance
 (Ref 78-31-00/201).

 S 014-025-N00

 (5)  
Open the fan cowl panels (Ref 71-11-04/201).

 D.  
Remove the Actuator Deploy or the Actuator Lock Proximity Sensors (Fig. 401).

 S 034-028-N00
 (1)  
Remove the fasteners and the clamps from the wire harness.

 S 034-029-N00

 (2)  
Disconnect each wire at the splice and attach a tag to identify the
 wire.

 S 024-030-N00

 (3)  
Remove the nut and the washer from the proximity sensor.

 S 024-031-N00

 (4)  
Remove the proximity sensor from the structure of the center locking hydraulic actuator.

 E.  
Remove the Auto Restow Proximity Sensor (Fig. 401).

 (1)  
Manually extend the thrust reverser (Ref 78-31-00/201).
　
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