A 
A 
B 
Control Stand - Microswitch Installation 
Figure 208A (Sheet 1) 

G52091
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 76-11-03
 SYNC LOCKS  ú
 ú N01 ú BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.  Page 228Oct 10/97 

5. JAM NUT
6. SLEEVE
9.
SCREWS
SWITCH)

Control Stand - Microswitch Installation
Figure 208A (Sheet 2)

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 76-11-03
 SYNC LOCKS  ú ú N01 Page 229 ú Oct 10/97
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
G52092
////////////////////////A / PW4000 SERIES /747-400 / ENGINES /MAINTENANCE MANUAL ////////////////////////
ENGINE  SWITCH NO.  SWITCH NAME 
S1B  SWITCH-AUTOBRAKE/AUTO SPEED BRAKE 
NO. 1  S181  SWITCH-THRUST REVERSER (DCV) 
ENGINE  S2B  SWITCH-AUTOBRAKE 
NO. 2  S182  SWITCH-THRUST REVERSER (DCV) 
ENGINE  S3B  SWITCH-AUTOBRAKE/AUTO SPEED BRAKE 
NO. 3  S183  SWITCH-THRUST REVERSER (DCV) 
ENGINE  S4B  SWITCH-AUTOBRAKE 
NO.4  S184  SWITCH-THRUST REVERSER (DCV) 

TABLE 1
SWITCH IDENTIFICATION FOR AIRPLANES
WITHOUT THRUST REVERSER SYNC LOCK

Control Stand - Microswitch Installation
Figure 208A (Sheet 3)

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 76-11-03
 SYNC LOCKS  ú
 ú N01 ú BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.  Page 230Oct 10/97 

G52063
2) P9 3) P10 4) P11 5) AIRPLANES WITH SYNC LOCKS;
 D41194P 6) AIRPLANES WITH SYNC LOCKS; D41195P 7) AIRPLANES WITH SYNC LOCKS; D41294P 8) AIRPLANES WITH SYNC LOCKS; D41295P
 (b)  
Make a mark at the locations where the cable clamps are installed on the microswitch pack assembly wire.

 (c)  
Remove the cable clamps from the control stand frame.

 NOTE: To move the microswitch pack assembly, it is necessary
____ to remove the cable clamps to loosen the wire.
 (d)  
Remove the four screws (2) and washers (3) from the microswitch pack assembly.

 (e)  
Remove the microswitch pack assembly (4).

 (f)  
Keep the microswitch pack assembly.

 TASK 76-11-03-022-156-N00
 20. Remove the Microswitches (Fig. 208, Fig. 208A)
________________________
 NOTE: For Airplanes With Thrust Reverser Sync Locks, refer to Fig. 208.
____ For Airplanes Without Thrust Reverser Sync Locks, refer to Fig. 208A.
 A. General
 (1)  This task gives access for the removal of the Autobrake/Auto Speed Brake and Thrust Reverser switches from the microswitch pack assembly.
 B. Standard Tools and Equipment
 (1)  Soldering tool - Commercially available
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 76-11-03
 ALL  ú ú N02 Page 231 ú Oct 18/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
C. References
 (1)  
AMM 20-11-25/201, Heat Guns and/or Soldering Irons

 (2)  
IPC 76-11-03 Fig. 1

 D.
Access

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

 E.
Procedure

 S 012-158-N00
　
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