(b)  
Tune the VHF transceivers to an approved test frequency.

 NOTE: Key only one transceiver at a time.
____
 (c)  
On the tester, set the SUBFRAME to 0 and the WORD to 12.

 (d)  
On the audio selector panel, put the switch to the L VHF position.

 (e)  
Push the PTT switch on the captain's or first officer's control wheel.

 (f)  
Make sure the BIT (DISCRETE) 1 shows a 0.

 (g)  
Release the PTT switch.

 (h)  
Set the WORD to 6.

 (i)  
Make sure that BIT (DISCRETE) 1 shows a 1.

 (j)  
On the audio selector panel, put the switch to the R VHF position.

 (k)  
Push the PTT switch on the control wheel.

 (l)  
Make sure the BIT (DISCRETE) 1 shows a 0.

 S 865-676-002
 (2)  Release the PTT switch.
 
 GUN 001-008, 010, 101 POST-EO B531006;  ú 31-31-00
 GUN 051, 102-999  ú CONFIG 2 ú 06 Page 530 ú Sep 28/01

A

757 MAINTENANCE MANUAL
 AC. HF Test
 S 735-729-002
 (1)  Do the HF test that follows:
 (a)  
Make sure the HF communication systems are operational (Ref 23-11-00).

 (b)  
Tune the left HF transceiver to an approved test frequency.

 (c)  
On the tester, set the SUBFRAME to 0 and the WORD to 9.

 (d)  
Make sure the BIT (DISCRETE) 1 shows a 1.

 (e)  
On the audio selector panel, put the switch to the L HF position.

 (f)  
Push the PTT switch on the captain's or the first officer's control wheel.

 (g)  
Make sure the BIT (DISCRETE) 1 shows a 0.

 (h)  
Release the PTT switch.

 (i)  
On the tester, set the SUBFRAME to 0 and the WORD to 14.

 (j)  
Make sure the BIT (DISCRETE) 2 shows a 1.

 (k)  
Tune the right HF transciever to an approved test frequency.

 (l)  
On the audio selector panel, set the switch to the R HF position.

 (m)  
Push the PTT switch on the control wheel.

 (n)  
Make sure the BIT (DISCRETE) 2 shows a 0.

 S 865-791-002
 (2) Release the PTT switch. AD. Ground Proximity Warning System (GPWS) Test
 S 735-777-002
 (1)  Do the GPWS test that follows:
 (a)  
Make sure the ground proximity warning system is operational (AMM 34-46-00/501).

 (b)  
On the tester, set the SUBFRAME to 0 and the WORD to 24.

 (c)  
Make sure the BIT (DISCRETE) 8 shows a 0.

 (d)  
Set the test switch on the miscellaneous test panel to the GND PROX position.
　
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本文鏈接地址：757 AMM 飛機(jī)維護(hù)手冊(cè) 儀表 CHAPTER 31 - INSTRUMENTS 1(96)