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A 
737-300/400/500MAINTENANCE MANUAL
 (b)  Put the flap control lever to the FLAP UP detent.
 (c)  Make sure that each flap and slat is in the FLAP UP position
 and aligned with the wing structure.
 (d)  Put the flap control lever to the 1-unit detent.
 1) Make sure the leading edge flaps extend fully.
 2) Make sure the leading edge slats move to the intermediate
 position.
 (e)  Put the flap control lever to the 5-unit detent.
 1) Make sure the leading edge flaps and slats do not move.
 (f)  Put the flap control lever to the 10-unit detent.
 1) Make sure the leading edge slats extend fully.
 (g)  Put the flap control lever to the 5-unit detent.
 1) Make sure the leading edge slats retract to the
 intermediate position.
 (h)  Put the flap control lever to the 1-unit detent.
 1) Make sure the leading edge flaps and slats do not move.
 (i)  Put the flap control lever to the FLAP UP detent.
 1) Make sure the leading edge flaps and slats retract fully.
 (j)  Release the pressure from hydraulic system B
 (Ref 27-81-00/201).

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737-300/400/500MAINTENANCE MANUAL
 LEADING EDGE STANDBY DRIVE SHUTOFF VALVE - MAINTENANCE PRACTICES
________________________________________________________________
 1.  General_______
 A.  There are five tasks in this procedure. There is a task for the removal and a task for the installation of the shutoff valve with the valve motor. There is also a task for the removal and a task for the installation of only the valve motor. The fifth task is a test of the shutoff valve.
 B.  You can replace the valve motor with the shutoff valve installed in the modular package.
 C.  The leading edge standby drive shutoff valve (referred to as the shutoff valve) and the standby rudder actuator shutoff valve are the same type of valve. The leading edge standby drive shutoff valve is on the right and the standby rudder actuator shutoff valve is on the left of the modular package.
 TASK 27-81-91-002-001
 2.  Leading Edge Standby Drive Shutoff Valve Removal (Fig. 201)________________________________________________
 A.  References
 (1)  
27-81-00/201, Leading Edge Flap and Slat Control System

 B.  
Access

 (1)  
Location Zone
 216 Main Wheel Well, LH

 C.  
Prepare for Removal

 S 862-002
 (1)  
Release pressure from the hydraulic systems and hydraulic reservoirs (Ref 27-81-00/201).

 S 862-003

 (2)  
Open these circuit breakers and attach DO-NOT-CLOSE tags:

 (a)  
P6-2 Circuit Breaker Panel
 1) FLAP SHUTOFF VALVES

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A 737-300/400/500MAINTENANCE MANUAL
SEE A
LEADING EDGE STANDBY DRIVE SHUTOFF VALVE
VALVE MOTOR VALVE ACTUATOR SHUTOFF STANDBY RUDDER SEE B  SCREWS MOUNTING 
LEVER POSITION 
VALVE 
VALVE CAM 
AFT BULKHEAD WHEEL WELL  A  B  (5 LOCATIONS) O-RINGS 
Figure 201 Standby Drive Shutoff Valve Installation 

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