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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
ATTACHING BRACKET 
LOWER CONTROL ROD  BOLT 
B 
B 

FWD  SPEED BRAKE LEVER ACTUATOR 
LEVER BRAKE  SHAFT 
B  2. BRACKET/BOLT 
1. BEARING/BOLT 
A-A  B-B 
INDEX NO. 1 2  PART NAME BEARING BOLT BOLT BRACKET  ID OD DIM. ID OD  DIAMETER DESIGN LIMITS MIN MAX 0.1897 0.1885 0.2500 0.2485 0.1900 0.1895 0.2540 0.2495  CLEAR-ANCE MAX WEAR LIMITS 0.1900 0.1881 0.2540 0.2481 0.0059 0.0019 DIA. WEAR DIM. PER-MITTED  REPLACE X PART WORN X X X  REPAIR WORN PART  REPAIR INSTR. 

Speed Brake Lever Actuator Wear Limits
Figure 601 (Sheet 2)

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A
737-300/400/500MAINTENANCE MANUAL
 SPEED BRAKE REFUSED TAKEOFF (RTO) SWITCH - REMOVAL/INSTALLATION
_______________________________________________________________
 1.  General_______
 A.  There are two tasks in this procedure. There is a task for the removal and a task for the installation of the refused takeoff (RTO) switch S650.
 B.  The RTO switch is installed in the left forward part of the control stand. The switch is operated by the movement of the reverse thrust levers in a reverse thrust direction. The switch operates with an arm which lifts the speed brake lever out of the down detent to permit automatic extension of the speed brakes.
 TASK 27-62-32-004-001
 2.  Speed Brake Refused Takeoff (RTO) Switch Removal (Fig. 401)________________________________________________
 A.  Access
 (1)  
Location Zone
 101, 102 Control Cabin

 B.  
Procedure

 S 864-002
 (1)  
Open these circuit breakers and attach DO-NOT-CLOSE tags:

 (a)  
P6 Panel
 1) AUTO SPEED BRAKE

 S 014-003
 (2)  
Remove the access plate from the switch cover on the control stand.

 S 024-004

 (3)  
Remove the RTO switch:

 (a)  
Disconnect the electrical wires from the RTO switch.

 (b)  
Remove the two screws that attach the RTO switch and the actuator to the structure.

 TASK 27-62-32-404-005
 3.  Speed Brake Refused Takeoff (RTO) Switch Installation (Fig. 401)_____________________________________________________
 A.  References
 (1)  24-22-00/201, Manual Control
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A

737-300/400/500
MAINTENANCE MANUAL

SEE A
SPEED BRAKE LEVERENGINE NO. 1 THRUST DRUM CAM FOLLOWER
RTO SWITCH 
SEE  B  ENGINE NO. 2 
THRUST DRUM  SPEED BRAKE 
SWITCH ACTUATING  CAM FOLLOWER  INDICATOR PLATE 
ARM  SPEED BRAKE 
DOWN DETENT 

A
SPEED BRAKE LEVER LIFTING ARM
LIFTING TAB
RTO ACTUATION SHAFT (SPLINED)
THRUST DRUM FWD CABLE GUARDS
A
A
Speed Brake Refused Takeoff (RTO) Switch Installation Figure 401 (Sheet 1)
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
SPEED
SECTOR
BRAKE

0.06
CLEARANCE
0.04
LIFTING ARM MAXIMUM TRAVEL
CLEARANCE
MINIMUM TRAVEL TO OPERATE THE RTO SWITCH (S650)
　
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