(f)  
Put the ALTERNATE FLAPS control switch to UP.

 (g)  
Put the ALTERNATE FLAPS control switch to OFF when the trailing edge flaps are fully retracted.

 (h)  
Put the ALTERNATE FLAPS arm switch to OFF.

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
 WARNING: MAKE SURE THAT PERSONS AND EQUIPMENT ARE CLEAR OF THE RUDDER,
_______ THE LEADING EDGE FLAPS AND THE SLATS BEFORE PRESSURIZATION. THE RUDDER, THE LEADING EDGE FLAPS AND THE SLATS CAN MOVE QUICKLY. THIS CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
 (i)  
Pressurize the System B hydraulic system.

 (j)  
Make sure the leading edge flaps and slats fully retracts.

 S 792-034
 (16)
 Examine the standby pressure module and the line connections for leaks.

 S 862-035

 (17)
 Remove electrical power (Ref 24-22-00/201).

 S 612-036

 (18)
 Do the servicing for the hydraulic reservoirs (Ref 12-12-00/301).

 TASK 29-15-81-002-003
 4.  Standby Pressure Module Filter Removal (Fig. 201)______________________________________
 A. General
 (1)  The standby pressure module is installed on the center of the aft wheel well bulkhead above the keel beam.
 B. Access
 (1)  Location Zone
 215 Keel Beam

 C. Procedure
 S 862-037
 (1)
Open these circuit breakers and attach DO-NOT-CLOSE tags:

 (a)  
P6-2 Circuit Breaker Panel 1) FLIGHT CONTROL SHUTOFF VALVES STBY RUD

 (b)  
P6-11 Circuit Breaker Panel
 1) STBY HYD PUMP NORMAL

 (c)  
P6-12 Circuit Breaker Panel
 1) STBY HYD PUMP (ALT)

 (2)  
Remove the filter bowl.

 (3)  
Remove the filter element.

 (4)  
Discard the filter element.

 S 022-062
 S 022-025
 S 022-026
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
 S 022-027
 (5)  Discard the O-rings and the backup rings.
 TASK 29-15-81-402-004
 5. Standby Pressure Module Filter Installation (Fig. 201)
___________________________________________
 A. Consumable Materials
 (1)  
D00567 Skydrol Assembly Lube - MCS 352

 (2)  
D00568 Fluid - Hydraulic, BMS 3-11

 B. References
 (1)  
12-12-00/301, Hydraulic Reservoir

 (2)  
24-22-00/201, Manual Control

 C. Access
 (1)  Location Zone
 215 Keel Beam

 D. Procedure
 S 422-043
 (1)  
Install the O-ring and the backup ring in the groove on top of the filter element.

 S 432-029

 (2)  
Install the backup ring, O-ring and backup ring in the groove in the module housing.

 S 642-030

 (3)  
Lightly apply assembly lube or hydraulic fluid to the filter bowl threads and the O-rings.

 S 612-031

 (4)  
Fill the filter bowl approximately half full with hydraulic fluid.

 S 422-032

 (5)  
Put the filter element in the module housing.

 (6)  
Install the filter bowl into the module housing.

 (7)  
Tighten the filter bowl to 50-200 pound-inches.

 (8)  
Install the lockwire.

 S 422-033
 S 432-034
 S 432-035
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