S 034-011

 (3)  
Remove the check valve and the O-ring from port 3 of the modular package.

 S 034-012

 (4)  
Remove the unions and the O-rings from the other six ports of the modular package.

 S 534-013

 (5)  
Install protective caps in the open ports of the modular package.

 TASK 27-09-21-404-030
 3.  Flight Controls Hydraulic Modular Package Installation______________________________________________________
 A. Consumable Materials
 (1)  
D00288 Lubricant, Skydrol Assembly - MCS 352

 (2)  
D00148 Fluid-Hydraulic, BMS 3-11, Type IV, Class 1

 B.
References

 (1)  
AMM 12-12-00/301, Hydraulic Reservoir

 (2)  
AMM 27-09-21/501, Flight Controls Hydraulic Modular Package

 C.
Access

 (1)  
Location Zones
 101/102 Control Cabin - Left/Right
 216/217 Left/Right Main Wheel Well

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737-300/400/500MAINTENANCE MANUAL
 D. Install the Flight Controls Hydraulic Modular Package
 S 544-015
 (1)  
Remove the protective caps from the seven ports of the modular package.

 S 644-016

 (2)  
Lubricate all the O-rings with hydraulic fluid or assembly
 lubricant.

 S 434-017

 (3)  
Install the O-ring in port 3 of the modular package.

 S 034-032

 (4)  
Install the check valve in port 3 with the flow arrow pointed away from the modular package.

 S 434-018

 (5)  
Install the O-rings and unions in the other six ports of the modular package.

 S 544-019

 (6)  
Remove the protective caps from the hydraulic tubing.

 S 024-033

 (7)  
Install the modular package (Fig. 401):

 (a)  
Install the modular package on its mounting bracket.

 (b)  
Install the four mounting bolts.

 (c)  
Connect the hydraulic tubing to the modular package.

 (d)  
Connect the electrical connectors to the valve motors and the low pressure warning switch.

 E.
Put the Airplane Back to Its Usual Condition

 S 864-035
 (1)
Remove the DO-NOT-CLOSE tags and close these circuit breakers:

 (a)  
P6-2 Circuit Breaker Panel 1) FLIGHT CONTROL SHUTOFF VALVES (two locations) 2) SPOILERS SHUT-OFF VALVES 3) IND LIGHTS

 S 724-027
 (2)  Do this task: "Flight Controls Hydraulic Modular Package Test" (AMM 27-09-21/501).
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 S 614-036
 (3)  Do this task if servicing is necessary for the hydraulic reservoir: "Hydraulic Reservoir Serving" (AMM 12-12-00/301).
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737-300/400/500MAINTENANCE MANUAL
 FLIGHT CONTROLS HYDRAULIC MODULAR PACKAGE - ADJUSTMENT/TEST
___________________________________________________________
 1.  General_______
 A.  There is one task in this procedure which is the test of the flight controls modular packages.
 B.  The modular package for hydraulic system A is found in the left main wheel well. The modular package for hydraulic system B is found in the right main wheel well.
　
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