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COMPUTER - (FIM 45-10-00/101) 
LEFT CENTRAL MAINTENANCE, M7373 1 
RIGHT CENTRAL MAINTENANCE, M7374 1 
INTERROGATOR - LEFT DME, B81  -- 1  117AL, MAIN EQUIP CTR, E2-3  34-55-01 
INTERROGATOR - RIGHT DME, B82  -- 1  117AL, MAIN EQUIP CTR, E2-2  34-55-01 
PANEL - (FIM 31-61-00/101)  1 
EICAS SELECT/FMC SWITCH
RELAY - (FIM 31-01-39/101)  1 
AIR/GROUND, R768 
RELAY - (FIM 34-61-00/101) 
FMC MASTER 1, R7229 1 
FMC MASTER 2, R7230 1 
TRANSPONDER - (FIM 34-53-00/101) 
LEFT ATC, B99  1 
RIGHT ATC, B100 1 
UNIT - (FIM 23-51-00/101)  1 
AUDIO MANAGEMENT, M7438
UNIT - (FIM 31-61-00/101) 
LEFT CONTROL DISPLAY, M7439 1 
RIGHT CONTROL DISPLAY, M7440 1 
UNIT - (FIM 34-61-00/101) 
CENTER EFIS/EICAS INTERFACE, M7352 1 
LEFT EFIS/EICAS INTERFACE, M7353  1 
RIGHT EFIS/EICAS INTERFACE, M7351 1 

* SEE THE WDM EQUIPMENT LIST
DME System - Component Index
Figure 101

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747-400 FAULT ISOLATION/MAINT MANUAL

DME System - Component Location
Figure 102 (Sheet 1)

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F55800
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747-400
FAULT ISOLATION/MAINT MANUAL

TEST PUSHBUTTONS

TEST

DME System - Component Location
Figure 102 (Sheet 2)

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747-400 MAINTENANCE MANUAL
 DME SYSTEM - ADJUSTMENT/TEST
____________________________
 1.  General_______
 A.  The adjustment/test procedure contains two tasks. The first task is an operational test which makes sure of the basic operation of the two DME systems. The procedure will do a ground test for each system. The ground test uses these on-board displays and controls to operate the self-test and monitor the test results:
 (1)  
Central Maintenance Computer (CMC)

 (2)  
Integrated Display System (IDS)

 (3)  
Engine Indicating and Crew Alerting System (EICAS)

 (4)  
Navigation Displays (NDs)

 (5)  
Control Display Unit (CDU).

 B.  The DME system test uses a ramp test set for a check of the DME systems.
 TASK 34-55-00-715-001
 2.  DME System - Operational Test_____________________________
 A.  References
 (1)  
AMM 24-22-00/201, Manual Control

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

 (3)  
AMM 34-61-00/501, Flight Management Computer System

 (4)  
AMM 45-10-00/201, Central Maintenance Computer System

 B.  Access
 (1)  Location Zones
 221 Control Cabin, LH
 222 Control Cabin, RH

 C.  Prepare for a Test of the DME Interrogator
 S 865-004
 (1)  
Supply electrical power (AMM 24-22-00/201).

 S 865-002

 (2)  
Close these circuit breakers:

 (a)  P7 Overhead Circuit Breaker Panel
 1) 7B08 NAV RADIO DME L
 2) 7B19 NAV RADIO DME R

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