S 865-200

 (4)  
Prepare the CDU for the test:

 (a)  
Push the MENU key on the CDU to show the MENU.

 (b)  
Push the line select key (LSK) that is adjacent to <CMC to show the <CMC MENU.

 (c)  
If <RETURN shows after you push the LSK, push the LSK that is adjacent to <RETURN until you see the CMC MENU.

 (d)  
Push the (LSK) that is adjacent to <GROUND TESTS to show the GROUND TESTS menu.

 (e)  
Push the NEXT PAGE key until you find <34 NAVIGATION RADIOS.

 (f)  
Push the LSK that is adjacent to <34 NAVIGATION RADIOS to show the GROUND TESTS menu for the navigation radios system.

 (g)  
Push the NEXT PAGE key until you find <ATC-L or <ATC-R.

 NOTE: If INHIBITED shows above <ATC-L or <ATC-R, the test will
____
 not operate.

 (h)  If INHIBITED shows above <ATC-L or <ATC-R: 1) Push the LSK that is adjacent to the test prompt. 2) Do the steps shown on the CDU.
 ~.............................. | -AIRPLANE ON GROUND. | | | | -SET THE ATC SELECT | | SWITCH ON THE ATC | | CONTROL PANEL TO STBY. | 2..............................1
 3)  Push the LSK that is adjacent to <RETURN to show the ground test menu again.
 E.  Air Traffic Control Ground Test
 S 745-168
 (1)  Push the LSK that is adjacent to the applicable prompt (<ATC-L or <ATC-R).
 NOTE: IN PROGRESS shows during the test.
____
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 34-53-00
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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747-400 MAINTENANCE MANUAL
 S 745-169
 (2)  When IN PROGRESS goes out of view, look for PASS or FAIL> adjacent to <ATC-L or <ATC-R.
 NOTE: If a PASS indication shows, no failures occurred during the
____
 test.

 (a)  If FAIL> shows: 1) Push the LSK that is adjacent to FAIL> to see the GROUND TEST MSG pages for the failure. 2) Push the NEXT PAGE key until you find all the GROUND TEST MSG pages. 3) Make a list of all CMCS messages, CMCS message numbers and ATA numbers that show on the GROUND TEST MSG pages.
 4)  Go to the CMCS Message Index of the Fault Isolation Manual (FIM) to find the corrective action for each CMCS message.
 F.  Put the Airplane in Its Usual Condition
 S 945-021
 (1)  Remove electrical power if it is not necessary (Ref 24-22-00/201).
 TASK 34-53-00-735-248
 4.  ATC System - System Test (With the TIC T-48 or T-49)
____________________________________________________
 A.  General
 (1)  
This sytem test uses the TIC T-48 or T-49 test set to test the functionality of the ATC system. All data will be shown at the end of the test if the test is successful. If a test has failed, the test sequence will abort and a failed message is displayed. You must do the diversity test and do either the automatic test or the individual tests to completely test the ATC system.

 (2)  
Operation with the antenna coupler, TAP-115, TAP-118 or TAP 125 used with the applicable test set, is necessary when the test is to do a check of the output power, receiver, sensitivity and radio frequency. For mode S diversity channel isolation check, the TAP 125 is necessary.

 (3)  
The test is applicable to the left and the right ATC system. Set the transponder select switch on the ATC control panel to the applicable position to do a test of that system.

 B.  Special Tools and Equipment
 (1)  
ATC Transponder Ramp Test Set TIC T-48 or T-49

 (2)  
METER - thruline RF wattmeter with type 500J element, Bird Model 43, Bird Electronic Corporation, 30303 Aurora Rd., Cleveland, OH 44139

 C.  References
 (1)  
AMM 24-22-00/201, Manual Control

 (2)  
AMM 31-61-00/501, Integrated Display System (IDS)

 (3)  
AMM 34-12-00/501, Air Data Computing System

 (4)  
AMM 34-53-02/401, ATC Transponder R/I

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