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A
737-300/400/500MAINTENANCE MANUAL
 S 824-007
 (4) Adjust and do a test of the switch (Ref 27-88-21/501).
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737-300/400/500MAINTENANCE MANUAL
 FLAPS 10-DEGREE SWITCH - ADJUSTMENT/TEST
________________________________________
 1.  General
_______
 A.  There are two tasks in this procedure. The first task is the adjustment of the flaps 10-degree switch. The second task is the test of the flaps 10-degree switch.
 TASK 27-88-21-825-001
 2.  Flaps 10-Degree Switch Adjustment (S584)
________________________________________
 A.  References
 (1)  
24-22-00/201, Manual Control

 (2)  
27-81-00/201, Leading Edge Flap and Slat Control System

 B.  
Access

 (1)  
Location Zone
 101 Control Cabin, LH
 102 Control Cabin, RH
 217 Main Wheel Well, RH

 C.  
Prepare for Adjustment

 S 865-002
 (1)  
Pressurize hydraulic system B (Ref 27-81-00/201).

 S 865-003

 (2)  
Supply electrical power (Ref 24-22-00/201).

 D.  
Adjust the Flaps 10-Degree Switch (S584)

 S 865-005
 WARNING: MAKE SURE THAT PERSONS AND EQUIPMENT ARE CLEAR OF THE WING
_______ CONTROL SURFACES. THE WING CONTROL SURFACES CAN MOVE QUICKLY. THIS CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
 (1)  
Move the flap control lever to the FLAP UP detent to retract the trailing edge flaps.

 (2)  
Remove the No. 4 jackscrew fairing.

 S 035-014
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A 737-300/400/500MAINTENANCE MANUAL
SEE A
FLAP TRANSMISSION ASSEMBLY  UPSTOP 
FLAP JACKSCREW NUMBER 4 
FWD  SEE UPSTOP B  A  BALL-SCREW NUT  UPSTOP (SCREW YOKE) UPSTOP (BALL-SCREW NUT) 
DIMENSION X 
B 
Flap Jackscrew Figure 501 

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737-300/400/500MAINTENANCE MANUAL
 (3)  S 975-015Make a record of the dimension X between the No. 4 the upstop (Fig. 501).  ballscrew nut and
 (4)  S 865-016Release the pressure from hydraulic system B (Ref 27-81-00/201).
 S 865-017

 CAUTION: MAKE SURE THE ALTERNATE FLAP DRIVE UNIT IS KEPT TO A LIMIT OF
_______ 10 MINUTES OPERATION AND 25 MINUTES OFF. THIS WILL PREVENT THE ALTERNATE FLAP DRIVE UNIT FROM DAMAGE.
 (5)  Put the alternate flap arm switch to the ARM position. NOTE: Operation of the alternate flap arm switch energizes the
____ standby hydraulic pump motor.
FLAP 
CONTROL 
UNIT  FLAPS 10-DEGREE 
SEE  A  SWITCH, S584 
SWITCH 
COVER 
SEE  B  RETAINING 
NUTS 
ROLLER GUIDE  PIN 
(EXAMPLE) 
AFT BULKHEAD 
FWD  INBD 
RIGHT WHEEL WELL  INBD 
　
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