S 864-024
 (2)
Remove the DO-NOT-CLOSE tags and close these circuit breakers:

 (a)  
P6-2 Panel
 1) IND LIGHTS

 E.
Put the Airplane Back to Its Usual Condition

 S 704-019
 (1)  
Do this task: "Low Pressure Warning Switch Test"
 (AMM 27-09-61/501).

 S 614-020

 (2)  
Do this task if servicing is necessary for hydraulic systems A and B reservoirs: "Hydraulic Reservoir Servicing" (AMM 12-12-00/301).

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A
737-300/400/500MAINTENANCE MANUAL
 LOW PRESSURE WARNING SWITCH - ADJUSTMENT/TEST
_____________________________________________
 1.  General_______
 A. This procedure contains the test of the low pressure warning switch.
 TASK 27-09-61-705-015
 2.  Low Pressure Warning Switch Test________________________________
 A. General
 (1)  
The low pressure warning switch is part of the flight controls modular package.

 (2)  
The modular package for hydraulic system A is located in the left main wheel well.

 (3)  
The modular package for hydraulic system B is located in the right main wheel well.

 B.
References

 (1)  
AMM 24-22-00/201, Manual Control

 (2)  
AMM 29-15-00/201, Hydraulic Systems A, B, and Standby

 C.
Access

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

 D.
Prepare for Test

 S 865-002
 (1)
Do this task: "Supply Electrical Power" (AMM 24-22-00/201).

 S 865-003

 (2)
Make sure these circuit breakers on panel P6 are closed:

 (a)  
IND LIGHTS

 E.
Do the Test of the Low Pressure Warning Switch

 S 725-005
 (1)  
Do this task to pressurize hydraulic systems A and B: "Hydraulic System A, B or Standby Pressurization" (AMM 29-15-00/201).

 S 725-014

 (2)  
Do the test of the switch:

 (a)  
Operate the aileron control wheel, control column, and rudder pedals to bleed the hydraulic system.

 (b)  
Make sure that there is no leakage of hydraulic fluid at the modular package.

 (c)  
Make sure that the LOW PRESSURE light is not on.

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A
737-300/400/500MAINTENANCE MANUAL
 S 865-009
 (3)  
Do this task to depressurize hydraulic systems A and B: "Hydraulic System A, B or Standby Depressurization" (AMM 29-15-00/201).

 S 725-010

 (4)  
Make sure that the LOW PRESSURE light comes on.

 S 725-011

 (5)  
Make sure that the master warning and caution lights, and flight controls warning light are on.

 F.
Put the Airplane Back to Its Usual Condition

 S 865-013
 (1)  Do this task if electrical power is not necessary: "Electrical Power Removal" (AMM 24-22-00/201).
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
 FLIGHT CONTROLS TRIM CORRECTION - TROUBLE SHOOTING
__________________________________________________
 1.  General
_______
 A.  Usually, component failure which may cause an inflight lateral trim
　
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