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L86313
A 737-300/400/500MAINTENANCE MANUAL
TROUBLE  PROBABLE CAUSE  ISOLATION PROCEDURE  REMEDY 
low after flight (Cont) rig procedures following normal repeatedly checks tension Control cable  (Cont) relaxation tension Excessive cable  Check control cable for broken wires (AMM 20-20-31/601).  (AMM 20-10-91/401). normal rig load 6. Replace control Cycle system cable 5 times while maintaining cable to normal service, rig approximately tension chart established in normal rig load cable rig load to relax below increased rig 5 times while rig load listed (AMM 27-41-00/ 5 times while 5. 2. 4. maintaining Do not allow maintaining Cycle system 3. Reduce cable rig load to Cycle system (Step 3). rig load (Step 3). 1 week of After in cable rig load NOTE____ load. 501). (Step 3). Step 3. 

Horizontal Stabilizer Trim Control System - Troubleshooting Chart Figure 101 (Sheet 5)
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A 737-300/400/500MAINTENANCE MANUAL
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A 737-300/400/500MAINTENANCE MANUAL
TROUBLE  PROBABLE CAUSE  ISOLATION PROCEDURE  REMEDY 
than 60` nose up. wheel is more stabilizer trim coast of the trim, the reverse During nose down down. than 20` nose wheel is more stabilizer trim coast of the trim, the reverse During nose up  tic clutches in Bad electromagne-the PSTA tic clutches in Bad electromagne-the PSTA  magnetic clutches. If for 28V DC at electro-Check for continuity and is bad. 28V DC is present, the PSTA magnetic clutches. If for 28V DC at electro-Check for continuity and is bad. 28V DC is present, the PSTA  Replace the PSTA Replace the PSTA (AMM 27-41-71/ 401). (AMM 27-41-71/ 401). 

Horizontal Stabilizer Trim Control System - Troubleshooting Chart Figure 101 (Sheet 6)
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L86301
A
737-300/400/500MAINTENANCE MANUAL
 HORIZONTAL STABILIZER TRIM CONTROL SYSTEM - ADJUSTMENT/TEST
___________________________________________________________
 1.  General
_______
 A.  There are five tasks in this procedure:
 (1)  
The operational test of the horizontal stabilizer trim system

 (2)  
The adjustment of the horizontal stabilizer trim system

 (3)  
The system test of the horizontal stabilizer trim system

 (4)  
The test of the stabilizer clutch friction

 (5)  
The test of the stabilizer trim auxiliary brake.

 B.  
Do not do this procedure in strong tail winds. The wind can cause the stabilizer trim control systems to align incorrectly.

 C.  
The painted marks on the fuselage and the leading edge of the horizontal stabilizer can be used for a visual indication of stabilizer travel. Do not use the marks to rig the stabilizer.

 TASK 27-41-00-715-008
 2.  Horizontal Stabilizer Trim Control System Operational Test
__________________________________________________________
 A.  References
 (1)  
AMM 24-22-00/201, Manual Control

 B.  
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