(d)  
Set the portable tester to SUBFRAME 0, WORD 48.

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

 (f)  
Supply hydraulic power to system A.

 (g)  
Remove hydraulic power from system B.

 (h)  
Pump the captain's brake pedals to remove the pressure from the main brake lines.

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

 S 865-610
 (3)  
Remove the hydraulic power if it is not necessary (AMM 29-00-00/201).

 S 865-611

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

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. BEJ 113 ú

 31-24-01
 ú ú 38B Page 559 ú Mar 12/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
 TASK 31-24-01-735-612
 46. Marker Beacon Signals Test__________________________
 A. Access
 (1)  Location Zones
 101 Control Cabin - Left
 102 Control Cabin - Right

 B. Procedure
 S 865-613
 (1)
Make sure you did the Prepare For Input Parameter Test task.

 S 735-614

 (2)  
Do this test of the marker beacon signals:

 (a)  
Set the portable tester to the SUBFRAMEs and WORDs shown in the table.

 (b)  
Push the SELF TEST button on the marker beacon receiver.

 (c)  
Make sure the applicable BIT light on the portable tester comes on when the marker lights (P1 and P3 panels) come on.

 NOTE: The SELF-TEST button on the marker beacon receiver
____ causes the marker beacon lights to come on. First the OUTER light will come on. Then, the MIDDLE light will come on. Then the AIRWAYS light will come on.
 ~............................................................... | MARKER BEACON | S/F | WORD | BEACON LIGHT | BIT | BIT LIGHT | | LIGHT | | | CONDITION | LIGHT | CONDITION | ................................................................. | AIRWAYS | 0 | 5 | ON | 1 | ON | | | | | OFF | 1 | OFF | ................................................................. | MIDDLE | 0 | 7 | ON | 2 | ON | | | | | OFF | 2 | OFF | ................................................................. | OUTER | 0 | 7 | ON | 1 | ON | | | | | OFF | 1 | OFF | 2...............….....…......…..............….......…...........1
 S 865-615
 (3)  If you will do no more tests, then do this task:
 "Put the Airplane to its Usual Condition."

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. BEJ 113 ú

 31-24-01
 ú ú 25B Page 560 ú Mar 12/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
 TASK 31-24-01-735-616
 47. Stab Trim Control Signal Test
_____________________________
 A. Reference
 (1) AMM 27-41-00/501, Horizontal Stabilizer Trim Control System
 B. Access
 (1)  Location Zones
 101 Control Cabin - Left
 102 Control Cabin - Right

 C. Procedure
 S 865-617
 (1)
Make sure you did the Prepare For Input Parameter Test task.

 S 735-618

 (2)  
Do this test of the stab trim control signals:

 (a)
Set the portable tester to SUBFRAME 0, WORD 22.

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

 (c)  
Put the A/P engage switch A to the CMD position.

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

 (e)  
Pull the control column aft until the stabilizer trim operates (AMM 27-41-00/501).

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

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

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