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 78-34-05
 ALL  ú ú N01 Page 409 ú Feb 10/92
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
THRUST REVERSER CONTROL SWITCH - REMOVAL/INSTALLATION
_____________________________________________________
 1.  General
_______
 A.  This procedure has two tasks:
 (1)
The first task is to remove the thrust reverser control switch.

 (2)
The second task is to install the thrust reverser control switch.

 B.  
The thrust reverser control switch will be referred to as a control switch in this procedure.

 C.  
The control switches cause the isolation valve to operate when they are opened or closed by the reverse thrust levers.

 D.  
There are four control switches, one for each thrust lever. The control switch is installed in the thrust lever assembly.

 E.  
You can find the removal and installation tasks for the microswitches that control the directional control valve (DCV) in AMM 76-11-03/201, Control Stand - Maintenance Practices.

 F.  
To get access to the control switches, you must open the applicable thrust lever switch cover on the thrust lever assembly. The removal and installation tasks are the same for all switches unless specified differently.

 G.  
To do these tasks, you must:
 Remove the electrical power from the thrust levers
 Remove the thrust lever switch cover
 Remove the control switch
 Install the control switch
 Adjust the control switch with the bubble protractor
 Install the thrust lever switch cover
 Do a check of the control switch operation
 Supply electrical power to the thrust levers.

 TASK 78-34-06-004-001-N00
 2.  Remove the Thrust Reverser Control Switch
_________________________________________
 A.  Equipment
 (1)
Gun - Heat (for detaching lead wires)

 B.  
References

 (1)
AMM 27-62-00 201, Speed Brake Control System

 (2)
AMM 76-11-03/201, Control Stand

 (3)
IPC 76-11-01, Fig. 2

 C.  
Access

 (1)  
Location Zone
 221 Control Cabin, LH
 222 Control Cabin, RH

 D.  
Prepare to Remove the Control Switch for the Thrust Reverser.

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 78-34-06
 ALL  ú ú N01 Page 401 ú Jun 10/94
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
S 044-018-N00
 WARNING: DO THE DEACTIVATION PROCEDURE FOR THE SPEED BRAKE CONTROL
_______ SYSTEM. IF YOU DO NOT DO THIS, THE SPOILERS CAN MOVE QUICKLY WHEN YOU MOVE THE THRUST LEVERS. THIS CAN CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
 (1)  
Do the deactivation procedure for the Speed Brake Control System (AMM 27-62-00/201).

 S 044-002-N00

 (2)
Remove electrical power from the thrust levers (AMM 76-11-03/201).

 E.
Remove the Control Switch for the Thrust Reverser (Fig. 401).

 S 014-003-N00
 (1)  Remove the applicable Thrust Lever Assembly Switch Covers.
 (a)  
Remove the three screws from the switch cover for the thrust lever assembly.

 (b)  
Remove the switch cover.

 (c)  
Keep the switch cover and screws.

 S 024-004-N00
 (2)  Remove the applicable control switch from the thrust lever.
 (a)  Remove the two screws and remove the applicable thrust reverser control switch from the thrust lever as follows: 1) Thrust lever one - control switch S101 2) Thrust lever two - control switch S102 3) Thrust lever three - control switch S103 4) Thrust lever four - control switch S104
 S 544-018-N00
 (3)  
Remove the shrink sleeving.

 S 934-021-N00

 (4)  
　
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