D.
Procedure

 S 012-146-N00
 (1)  
Do this task: Remove the Microswitch Pack Cover.

 S 012-148-N00

 (2)  
Remove the ceiling panels in the main passenger cabin to get access to the connector plugs below the control stand (AMM 25-22-01/401).

 S 022-037-N00
 CAUTION: BE VERY CAREFUL DURING THE REMOVAL AND WHEN YOU HOLD THE
_______ MICROSWITCH PACK ASSEMBLY. DAMAGE TO THE SWITCHES, NUTPLATES, OR WIRE CONNECTIONS CAN OCCUR.
 (3)  Remove the microswitch pack assembly.
 (a)  Disconnect the electrical connector and install the protection caps on the electrical connector and the mating receptacle as follows: 1) P8
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 76-11-03
 ALL  ú ú N02 Page 224 ú Oct 18/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 
FLIGHT COMPARTMENT SEE A  4. MICROSWITCH PACK ASSEMBLY 
1. SCREW (3 LOCATIONS)  COVER FOR THE MICROSWITCH PACK ASSEMBLY 
2. SCREW (4 LOCATIONS)  A 
PACK ASSEMBLY SEE B MICROSWITCH  3. WASHER (4 LOCATIONS) 
B 

A
Control Stand - Microswitch Installation Figure 208 (Sheet 1)
G52084
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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 ú N01 ú BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.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 225Oct 15/98 

////////////////////////A / PW4000 SERIES /747-400 / ENGINES /MAINTENANCE MANUAL ////////////////////////
7. MICRO SWITCHES
( 3 FOR EACH PLUNGER)

5. JAM NUT
B 6. SLEEVE
4. MICROSWITCH PACK ASSEMBLY
B  A-A 
5. JAM NUT 8. PLUNGER 
6. SLEEVE 
10. SWITCH TERMINALS (3 LOCATIONS)  7. MICROSWITCH (3 FOR EACH PLUNGER) 
9.  SCREWS MOUNTING (2 FOR EACH SWITCH) 

DIMENSION
A

8. PLUNGER
B-B
Control Stand - Microswitch Installation Figure 208 (Sheet 2)
G52085
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 SYNC LOCKS  ú
 ú N01 ú BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.  Page 226Oct 10/97 

ENGINE NO. 1  SWITCH NO. S1B  SWITCH NAME SWITCH-AUTOBRAKE/AUTO SPEED BRAKE 
S181  SWITCH-THRUST REVERSER (DCV) 
S191  SWITCH-THRUST REVERSER SYNC LOCK 
ENGINE NO. 2  S182  SWITCH-THRUST REVERSER (DCV) 
S2B  SWITCH-AUTOBRAKE 
S192  SWITCH-THRUST REVERSER SYNC LOCK 
ENGINE NO. 3  S3B  SWITCH-AUTOBRAKE/AUTO SPEED BRAKE 
S183  SWITCH-THRUST REVERSER (DCV) 
S193  SWITCH-THRUST REVERSER SYNC LOCK 
ENGINE NO. 4  S4B  SWITCH-AUTOBRAKE 
S184  SWITCH-THRUST REVERSER (DCV) 
S194  SWITCH-THRUST REVERSER SYNC LOCK 

TABLE 1
SWITCH IDENTIFICATION FOR AIRPLANES
WITH THRUST REVERSER SYNC LOCK

Control Stand - Microswitch Installation
Figure 208 (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 227Oct 10/97 

G52062
////////////////////////A / PW4000 SERIES /747-400 / ENGINES /MAINTENANCE MANUAL ////////////////////////
SEE  A  1. SCREW (3 LOCATIONS)  PACK ASSEMBLY MICROSWITCH COVER FOR THE 
BSEE PACK ASSEMBLY MICROSWITCH  3. WASHER 2. SCREW (4 LOCATIONS) (4 LOCATIONS) 
4. MICROSWITCH PACK ASSEMBLY 
　
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