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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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747-400 MAINTENANCE MANUAL
 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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