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747-400 MAINTENANCE MANUAL
 (d)  
CDU installed (AMM 34-61-02/401).

 (e)  
Central Maintenance Computer System (CMCS), serviceable (AMM 45-10-00/501).

 E.  Prepare for the Test
 S 865-043
 (1)  
Supply electrical power (AMM 24-22-00/201).

 S 865-111

 (2)  
Make sure the engines are off.

 S 865-044

 (3)  
Prepare the CDU for the test:

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

 (b)  
Push the <CMC line select key (LSK) 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 <31 RECORDING.

 (f)  
Push the LSK that is adjacent to <31 RECORDING to show the GROUND TESTS menu for the recording systems.

 NOTE: If the INHIBITED indication is shown above <ACMS, the
____
 test will not operate.

 (g)  If INHIBITED shows above the <ACMS prompt: 1) Push the LSK that is adjacent to the test prompt. 2) Do the steps shown on the CDU. 3) Push the LSK that is adjacent to <RETURN to show the ground
 test menu again.
 F.  ACMS Ground Test
 S 745-045
 (1)  Push the LSK that is adjacent to <ACMS.
 NOTE: The IN PROGRESS indication shows during the test.
____
 (a)  When IN PROGRESS goes out of view, look for PASS or FAIL> adjacent to <ACMS.
 NOTE: If a PASS indication shows, no failures occurred
____
 during the test.

 (b)  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.
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 4)  Go to the CMCS Message Index of the Fault Isolation Manual (FIM) to find the corrective action for each CMCS message.
 G.  Put the Airplane in Its Usual Condition
 S 865-046
 (1)  Remove the electrical power if it is not necessary
 (AMM 24-22-00/201).

 TASK 31-35-00-735-184
 4.  System Test - Airplane Condition Monitoring System__________________________________________________
 A.  Equipment
 (1)  A27092-84 Actuator/Deactuator Set - Proximity Sensors, or equivalent
 B.  References
 (1)  
AMM 24-22-00/201, Manual Control

 (2)  
AMM 29-11-00/201, Main Hydraulic Supply System

 (3)  
AMM 32-09-02/201, Air/Ground Relay System

 C.  Access
 (1)  Location Zone
 117 Electrical/Electronic Compartment, Left
 221 Flight Compartment, Left
 222 Flight Compartment, Right

 D.  CMC Interface Test
 S 745-185
 (1)  Do the CMCS ground test of the airplane condition monitoring system (AMM 31-35-00/501).
 E.  DMU Discrete Input Test
 S 865-186
 (1)  Do these steps to get access to the ACMS DISCRETE INPUT display on the CDU:
 (a)  
Push the MENU key on the center CDU.

 (b)  
Push the line select key adjacent to <ACMS.

 (c)  
Push the line select key adjacent to <DATA DISPLAY.

 (d)  
Push the line select key adjacent to <DISCRETE DATA.

 (e)  
Make sure that the DISCRETE DATA display shows on the CDU.

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