TASK 31-24-00-735-041
 10. Airspeed Signals Test
_____________________
 A. Special Tools and Equipment
 (1)  Pneumatic Test unit
 B. References
 (1)  
AMM 34-11-00/501, Pitot-Static System

 (2)  
AMM 34-11-01/501, Pitot-Static System

 C. Access
 (1)  Location Zone
 101 Control Cabin - Left
 102 Control Cabin - Right

 D. Procedure
 S 865-042
 (1)  
Make sure you did the Prepare for Input Parameter Test task.

 S 485-008

 (2)  
Connect the pneumatic test unit to the pitot-static system (Ref 34-11-00/501).

 S 735-043

 (3)  
Do this test of the airspeed signals:

 (a) Set the portable tester to SUBFRAME 0, WORD 19.
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
 (b)  
Use the pneumatic test unit to make the airspeeds shown in the table.

 (c)  
Make sure the portable tester display agrees with the values in the table. ~................................................ | AIRSPEED (KNOTS) | PORTABLE TESTER DISPLAY | .................................................. | 100 | 7651 to 0126 (nominal 0000) | .................................................. | 400 | 4145 to 4421 (nominal 4273) | 2..................….............................1

 S 865-046
 (4)  
Set the pneumatic test unit to the usual pressure of the air.

 S 085-047

 (5)  
Disconnect the pneumatic test unit from the pitot-static system.

 S 865-048

 (6)  
If you will do no more tests, then do this task: "Put the Airplane to its Usual Condition."

 TASK 31-24-00-735-049
 11. ATC Event (Radio Keying) Signals Test
_____________________________________
 A. References
 (1)  AMM 23-21-00/501, VHF Communication System
 B. Access
 (1)  Location Zone
 101 Control Cabin - Left
 102 Control Cabin - Right

 C. Procedure
 S 865-050
 (1)  
Make sure you did the Prepare for Input Parameter Test task.

 S 865-051

 (2)  
Make sure all the VHF transceivers are serviceable (AMM 23-21-00/501).

 S 865-053

 (3)
Tune all the transceivers to approved frequencies.

 S 865-054

 (4)  
Set the portable tester to SUBFRAME 0, WORD 9.

 S 735-058

 (5)  
Do this test of the VHF-1 Signals:

 (a)  
Set the captain's audio selector panel to VHF-1.

 (b)  
Make sure the BIT 1 light is off.

 (c)  
Push the captain's PTT button.

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

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 31-24-00
 ú ú 11 Page 509 ú Jul 12/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
 (e)  Release the PTT button.
 S 735-059
 (6)  Do this test of the VHF-2 Signals: (a) Set the captain's audio selector panel to VHF-2. (b) Make sure the BIT 1 light is off. (c) Push the captain's PTT button. (d) Make sure the BIT 1 light is on. (e) Release the PTT button.
 S 735-060
 (7)  Do this test of the VHF-3 Signals: (a) Set the captain's audio selector panel to VHF-3. (b) Make sure the BIT 1 light is off. (c) Push the captain's PTT button. (d) Make sure the BIT 1 light is on. (e) Release the PTT button.
 S 735-063
 (8)  Use the first officer's audio selector panel and the first officer's PTT button to do the tests again.
 S 865-065
 (9)  If you will do no more tests, then do this task: to its Usual Condition." "Put the Airplane

 TASK 31-24-00-865-112
 12. Put the Airplane to its Usual Condition
　
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