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FAULT HISTORY BY LEGS Page
The page shows these data for legs 1 through 5:
-Flight leg
-Number of faults for that leg
-Time the flight leg started
-Date of the flight leg.
To see more data about the faults on a flight leg, push the LSK next to the flight leg. If there are no faults for that leg, you see the page that shows ** NO FAULT **. If there are faults, you go to a FAULT FOR EACH LEG page.
To see the faults for the other legs, use the NEXT PAGE function key on the MCDU.
FAULT FOR EACH LEG Page
This page shows these data for each leg:
-Flight leg
-DFCS fault
-Channel that had the fault
-Roll and pitch modes that were active when the fault occurred
-Monitor that found the fault
-Suspect LRUs
-Flight number
-Time of fault
-Date of flight
-Altitude when fault occurred
-Airspeed when fault occurred.
To see all of the faults for that leg, you can use the NEXT PAGE and PREV PAGE function keys on the MCDU.
If you push LSK 6R, you will go back to the FAULT HISTORY BY LEGS page. If you want to do an LRU interface test on the suspect LRU, push LSK 6L. You will go through these LRU tests:
-Autotest
-Interactive
-Surface.
If the tests passes, you get the FAULT HISTORY TEST PASSED page. If the test does not pass, you get the FAULT HISTORY TEST FAILED page.
January 1, 2004
22-11
- 29 -
SOUTHWEST AIRLINES PROPRIETARY(c) All rights reserved
SOUTHWEST AIRLINES.
737-700 MAINTENANCE TRAINING MANUAL
DFCS BITE PAGES - FAULT HISTORY SORTED BY FLIGHT LEG

A22-11-00-122.fm
FAULT HISTORY TEST PASSED Page (Not Shown) This page shows these data: -LRU that was tested -Which channel was tested -Group number
-Library test number. If you push LSK 6R, you will go to the NEXT PAGE OF LEG FAULTS. FAULT HISTORY TEST FAILED Page This page shows these data:
-LRU that was tested
-Which channel was tested
-Group number
-Library test number.

If you push LSK 6L, you will go to the FAULT HISTORY SUSPECT
LRU(S) page.

FAULT HISTORY SUSPECT LRU(S) Page
This page is similar to the other suspect LRU pages that were shown.
To see test data about the failures, push LSK 6L. This shows the test
data page.

Test Data Page
This is the same as the other test data pages. It shows what step the
test was on when it recorded the failure. It also shows the value of the

failed data. To rerun the test, push LSK 6L. To return to the FAULT FOR EACH LEG page, push LSK 6R.
Rockwell Collins Enhanced Digital Flight Control System Differences
The menu’s that access the fault history screens are the same on the Collins EDFCS and on the Honewell DFCS. Once you access a specifc fault history screen, the Collins differences are idenfied as follows.
For ARINC 429: Honeywell identiies invalid parameters. Collins identifies the LRU, and distinguishes bus ACTIVITY (NO ADIRU (IRU) DATA) from Sign Status Matrix (SSM) Fail ( ADIRU(IRU) DATA INV).
　
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