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TROUBLE  PROBABLE CAUSE  ISOLATION PROCEDURE  REMEDY 
Sluggish oper-ation of one spoiler One spoiler does not raise to same angle during repeated tests Spoilers do not raise to same angle during repeated tests  Defective spoiler actuator Spoiler hinges or rod end bearings worn worn ratio changer Spoiler-mixer or  Operate spoilers and check actuator for evidence of overheating ratio changer for wear Check spoiler wear Check spoiler-mixer and  Replace spoiler actuator Repair or replace mixer or ratio changer Replace spoiler-worn parts (Ref 27-61-11, I/C) 

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 27-61-00
 ALL  ú ú 01 Page 103 ú Jun 25/84
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
 SPOILER CONTROL SYSTEM - MAINTENANCE PRACTICES
______________________________________________
 1.  General_______
 A.  There are two tasks in this procedure. There is a task to supply the hydraulic power to systems A and B. There is also a task to remove the hydraulic power from the systems A and B.
 B.  You must release the pressure from the hydraulic systems A and B before you do maintenance on the spoiler control system. This is to prevent injury to persons because of accidental operation of the control system during maintenance. You must keep maintenance stands and equipment away from the limits of travel of the control surfaces.
 C.  When you operate the hydraulic systems A and B, you must obey these conditions:
 (1)  A minimum of 1675 pounds (761 kilograms, 250 gallons) of fuel is necessary in each fuel tank keep the hydraulic fluid cool. On hot days, or when the temperature of the fuel is more than 90°F (32.2°C), you must monitor the overheat indicators. Turn the pump switches off if the hydraulic fluid becomes too hot.
 TASK 27-61-00-862-023
 2.  Spoiler Hydraulic Systems A and B Pressurization________________________________________________
 A.  References
 (1)  
AMM 12-12-00/301, Hydraulic Servicing

 (2)  
AMM 24-22-00/201, Manual Control

 (3)  
AMM 32-00-01/201, Ground Lock Assemblies

 B.  
Access

 (1)  
Location Zone
 101, 102 Control Cabin
 216, 217 Main Wheel Well

 C.  
Pressurize the Hydraulic Systems A and B

 (1)  
Supply the electrical power (AMM 24-22-00/201).

 (2)  
Make sure that the hydraulic reservoirs are full (AMM 12-12-00/301).

 S 862-002
 S 212-003
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 27-61-00
 ALL  ú ú 02 Page 201 ú Mar 15/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
 S 862-004
 (3)  
Make sure this circuit breaker is closed:

 (a)  
P6-2 Panel
 1) SHUTOFF VALVES - SPOILER

 

 S 862-005
 (4)  Set the parking brake.
 S 042-029
 WARNING: MAKE SURE THAT THE GROUND LOCKS ARE INSTALLED IN ALL OF THE
_______ LANDING GEAR BEFORE YOU PRESSURIZE THE HYDRAULIC SYSTEMS. WITHOUT THE GROUND LOCKS, THE LANDING GEAR CAN RETRACT AND CAUSE INJURIES TO PERSONS AND DAMAGE TO EQUIPMENT.
 (5)  Install the landing gear ground lock assembly in the nose gear (AMM 32-00-01/201).
 S 862-025
 WARNING: KEEP PERSONS AND EQUIPMENT CLEAR OF THE FLIGHT CONTROL
_______ SURFACES. THESE COMPONENTS CAN MOVE SUDDENLY WHEN YOU SUPPLY HYDRAULIC POWER. THIS CAN CAUSE INJURIES TO PERSONS AND DAMAGE TO EQUIPMENT.
 (6)  
Set the ELEC 2, HYD PUMPS A or the ELEC 1, HYD PUMPS B switches on the forward overhead panel to the ON position (Fig. 201).

 S 862-028

 (7)  
Set the FLT CONTROL SPOILER A and B switches on the forward overhead panel to the ON position.

 NOTE: To supply pressure to the hydraulic system A or B separately,
____
 set the applicable SPOILER A or B switch.

 D. Put the Airplane Back to Its Usual Condition
 S 862-009
 (1)  
　
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