(i)  
Push the control column forward until the stabilizer trim operates.

 (j)  
Make sure the BIT 1 light on the portable tester comes on.

 (k)  
Put the control column in the neutral position.

 (l)  
Make sure the BIT 1 light on the portable tester goes out.

 S 865-619
 (3)  If you will do no more tests, then do this task:
 "Put the Airplane to its Usual Condition."

 TASK 31-24-01-735-620
 48. Stab Trim Switch Signal Test
____________________________
 A. Access
 (1)  Location Zones
 101 Control Cabin - Left
 102 Control Cabin - Right

 B. Procedure
 S 865-621
 (1) Make sure you did the Prepare For Input Parameter Test task.
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. BEJ 113 ú

 31-24-01
 ú ú 23B Page 561 ú Mar 12/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
 S 735-622
 (2)  Do this test of the signals from the stab trim switch:
 (a)  
Set the portable tester to SUBRAME 0, WORD 25.

 (b)  
Make sure the trim switches on the control wheel are in the neutral position.

 (c)  
Make sure the BIT 2 light on the portable tester is off.

 (d)  
Set the trim switch on the captain's control wheel to the TRIM NOSE UP position.

 (e)  
Make sure the BIT 2 light on the portable tester is on.

 (f)  
Set the trim switch on the captain's control wheel to the neutral position.

 (g)  
Make sure the BIT 2 light on the portable tester goes out.

 (h)  
Set the trim switch on the captain's control wheel to the TRIM NOSE DN position.

 (i)  
Make sure the BIT 1 light on the portable tester is on.

 (j)  
Set the trim switch on the captain's control wheel to the neutral position.

 (k)  
Make sure the BIT 1 light on the portable tester goes out.

 S 735-623
 (3)  
Do the test again on the first officer's control wheel.

 S 865-624

 (4)  
If you will do no more tests, then do this task:
 "Put the Airplane to its Usual Condition."

 TASK 31-24-01-735-625
 49. Stick Shaker Signals Test
_________________________
 A. Access
 (1)  Location Zones
 101 Control Cabin - Left
 102 Control Cabin - Right

 B. Procedure
 S 865-626
 (1)
Make sure you did the Prepare For Input Parameter Test task.

 S 735-627

 (2)  
Do this test of the stick shaker signals:

 (a)  
Set the portable tester to SUBFRAME 0, WORD 28.

 (b)  
Make sure the BIT 2 light on the portable tester is off.

 (c)  
Push the STALL WARNING TEST NO. 1 button on the stall warning module.

 (d)  
Make sure the BIT 2 light on the portable tester comes on.

 (e)  
Release the STALL WARNING TEST NO. 1 button.

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. BEJ 113 ú

 31-24-01
 ú ú 38B Page 562 ú Mar 12/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
 (f)  
Make sure the BIT 2 light on the portable tester is off.

 (g)  
Push the STALL WARNING TEST NO. 2 button.

 (h)  
Make sure the BIT 1 light on the portable tester comes on.

 (i)  
Release the STALL WARNING TEST NO. 2 button.

 (j)  
Make sure BIT 1 light of the portable tester is off.

 S 865-628
 (3)  If you will do no more tests, then do this task:
 "Put the Airplane to its Usual Condition."

 TASK 31-24-01-735-629
 50. Thrust Reverser Position Signals Test_____________________________________
 A. Reference
 (1)  AMM 78-31-00/501, Thrust Reverser System
　
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