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737-700 MAINTENANCE TRAINING MANUAL 
- CROSSLOAD FMC-R TO FMC-L 
- CROSSLOAD IN PROGRESS 
- CROSSLOAD COMPLETE 

-CROSSLOAD FAIL (the data base in the source FMC did not crossload to the target FMC) -CROSSLOAD UNAVAILABLE (the source FMC cannot interface with the other FMC) -SET FMC SOURCE SELECT TO BOTH ON R (shown when the primary FMC is also the target FMC).
To start the crossload, select COPY FROM LEFT or COPY FROM RIGHT on the MCDU and push the EXEC key. The message, CROSSLOAD IN PROGRESS shows during the crossload process. At the end of the crossload, the message, CROSSLOAD COMPLETE shows on the MCDU.
Line 6L shows one of these prompts:
-INDEX (selects the FMCS BITE INDEX page) -CANCEL (shows when the source FMC for the crossload is selected but the EXEC key was not pushed) -NEXT MISMATCH (shows when there is another data base that has a mismatch).
If there are no more mismatches between the FMCs, the INDEX prompt shows.
This line is blank while the crossload is in progress.
NOTE:  The example on the graphic shows a mismatch between the navigation data bases of the two FMCs.
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CROSSLOAD FAILURE
A34-61-00-052.fm
FMCS - DATABASE CROSSLOAD PAGE
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DIGITAL FLIGHT CONTROL SYSTEM
(DFCS)

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DFCS BITE PAGES - BITE LIBRARY General
Maintenance action on the DFCS occurs only after the crew reports a problem in the flight log. The report occurs when a failure on the airplane causes a flight deck effect, such as autopilot A disengages. You use the built in test equipment (BITE) with the fault isolation manual (FIM) to find the problem.
BITE has these main properties:
-BITE uses the FMCS MCDUs -BITE shows all current failures and finds the line replaceable units (LRU) with the failures -BITE lets you do a test of the LRU interfaces after you change an LRU -BITE lets you do a rigging test of the system actuators and sensors -BITE stores and shows failures for the last 40 flights.
　
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