* 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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