(b)  
Set the portable tester to SUBFRAME 0, WORD 14.

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

 (d)  
Push the captain's PTT button.

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

 S 735-503
 (10)
 Use the first officer's audio selector panel and the first officer's PTT button to do the tests again.

 S 865-504

 (11)
 If you will do no more tests, then do this task:
 "Put the Airplane to its Usual Condition."

 TASK 31-24-01-735-505
 33. Autothrottle Disengage Switch Signal Test_________________________________________
 A. Access
 (1)  Location Zones
 101 Control Cabin - Left
 102 Control Cabin - Right

 B. Procedure
 S 865-506
 (1)
Make sure you did the Prepare For Input Parameter Test task.

 S 735-507

 (2)  
Do this test of the signals from the autothrottle disengage switch:

 (a)  
Set the portable tester to SUBFRAME 0, WORD 8.

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

 (c)  
Push the A/T disengage switch on the thrust lever for engine No. 1.

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

 (e)  
Release the A/T disengage switch.

 S 865-508
 (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 44B Page 543 ú Mar 12/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
 TASK 31-24-01-735-509
 34. Autothrottle Warning Signals Test
_________________________________
 A. Access
 (1)  Location Zones
 101 Control Cabin - Left
 102 Control Cabin - Right

 B. Procedure
 S 865-510
 (1)
Make sure you did the Prepare For Input Parameter Test task.

 S 735-511

 (2)  
Do this test of the autothrottle warning signals:

 (a)  
Set the portable tester to SUBFRAME 0, WORD 43.

 (b)  
Make sure the autothrottle is engaged.

 (c)  
Make sure the autothrottle warning lights are off.

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

 (e)  
Push the autothrottle disconnect switch.

 (f)  
Make sure the autothrottle warning lights flash.

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

 (h)  
Release the autothrottle disconnect switch.

 S 865-512
 (3)  If you will do no more tests, then do this task:
 "Put the Airplane to its Usual Condition."

 TASK 31-24-01-735-513
 35. Cabin Altitude > 10k ft Signals Test
____________________________________
 A. Access
 (1)  Location Zones
 101 Control Cabin - Left
 102 Control Cabin - Right

 B. Procedure
 S 865-514
 (1)
Make sure you did the Prepare For Input Parameter Test task.

 S 735-515

 (2)  
Do this test of the cabin altitude > 10k ft signals:

 (a)  
Remove the connector D776 from the cabin pressure switch S128 at STA 192, WL 207, BL 0.

 (b)  
Set the portable tester to SUBFRAME 2, WORD 13.

 (c)  
Ground pin A of electrical connector D776.

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

 (e)  
Remove the ground from pin A on electrical connector D776.

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. BEJ 113 ú

 31-24-01
 ú ú 20B Page 544 ú Mar 12/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
　
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