S 865-024

 (2)
Put the POWER switch on the portable tester to the OFF position.

 S 085-025

 (3)  
Disconnect the portable tester from the flight data recorder system.

 S 415-027

 (4)  
Close the forward access door 1103.

 (5)  
Remove the hydraulic power (Ref 29-15-00/201).

 S 865-029

 (6)  
Remove the electrical power if it is not necessary
 (Ref 24-22-00/201).

 S 865-028
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. B-2535 AND ON ú

 31-24-52
 ú ú 09 Page 504 ú Mar 15/97
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
 SPEED BRAKE HANDLE POSITION SENSOR - REMOVAL/INSTALLATION
_________________________________________________________
 1.  General_______
 A.  There are two tasks in this procedure. There is one task for the removal and one task for the installation of the position sensor for the speed brake handle.
 B.  For these tasks, it is necessary to open the forward nose wheel well panel.
 TASK 31-24-56-004-001
 2.  Speed Brake Handle Position Sensor Removal__________________________________________
 A.  General
 (1)  The position sensor for the speed brake handle is on the forward bracket of the drum mechanism and actuator assembly for the auto speed brake (Fig. 401).
 B.  Access
 (1)  
Location Zones
 101 Control Cabin - Left
 102 Control Cabin - Right
 202 Lower Nose Compartment

 (2)  
Access Panel
 3101L Forward Nose Wheel Well Door - Left
 3104L Forward Nose Wheel Well Panel - Left

 C.  Procedure
 S 864-002
 (1)  
Put the hydraulic switches A and B for flight control on the P5 overhead panel to the OFF position.

 S 864-003

 (2)  
Open these circuit breakers:

 (a)  P18 Load Control Panel
 1) FLIGHT RECORDER AC
 2) FLIGHT RECORDER DC
 3) FLIGHT RECORDER POSITION SENSOR

 (3)  
Make sure the speed brake handle is in the DOWN position.

 (4)  
Open the door, 3101L, for the forward nose wheel well.

 (5)  
Install the landing gear downlocks.

 S 864-004
 S 014-005
 S 434-036
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù.
 BEJ 17 PQ361 THRU PQ399 ú  31-24-56
 ú ú 12 Page 401 ú Jul 15/92
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A

737-300/400/500
MAINTENANCE MANUAL

SPEED BRAKE CONTROL LEVER
SEE  A  CONTROL CABIN FLOOR 
SEE  B 
FWD  INBD  A  AUTO SPEED BRAKE ACTUATOR ASSEMBLY DRUM MECHANISM AND 

SENSOR
MOUNTING
BRACKET

SPEED BRAKE HANDLE POSITION SENSOR
JAMNUT
CRANK ARM SET SCREW
POSITION SENSOR LOCATION DETAIL B
Speed Brake Handle Position Sensor Installation Figure 401
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù.
 BEJ 17 PQ361 THRU PQ399 ú 31-24-56
 ú ú 12 Page 402 ú Jul 15/92
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
 S 014-006
 (6)  
Open the panel, 3104L, for the forward nose wheel well.

 S 024-033

 (7)  
Remove the sensor (Fig. 401):

 (a)  
Write down the color identification of the sensor wires.

 (b)  
Remove the screws from the sensor terminals.

 (c)  
Remove the wires from the sensor.

 (d)  
Loosen the set screw on the crank arm.