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01-00-00-209 Rev 1 11/16/1996
AIRCRAFT
FLIGHT LOG
FAULT ISOLATION FIX OR
MANUAL
DISPATCH FAULT REPORTING
DEVIATION
OR
GUIDEMANUAL TASK NUMBER
BITE
FLIGHT CREW
MANUAL
WRITE-UP DEFER THE
PROBLEM TEST THE LRU AND GET THE MAINTENANCE MESSAGE
AIRPLANEFAULT ISOLATION
FAULT ISOLATION
JOBMAINTENANCEMANUAL MANUAL COMPLETEMANUAL
AIRCRAFT
LOOK IN A TABLE R&I THE LRU COMPLETE THE FIM LRU TESTS FLIGHT LOG
FOR TASK NUMBER TASK AND VERIFY GOOD COMPLETE THE
THEN DO THE TASK THE REPAIR PAPERWORK
(R&I THE LRU)
MAINTENANCE DOCUMENTS - SCENARIO 1 - FAILED LRU
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737-600/700/800/900 TRAINING MANUAL
MAINTENANCE DOCUMENTS -- SCENARIO 2 - LOST INPUT TO LRU
General -The test shows the wiring is bad. -The maintenance crew uses the system schematics
Scenario 2 shows flow and use of the tools for a lost and wiring diagrams to troubleshoot the bad
input to a line replaceable unit (LRU). The flow shows wiring.
these steps: -The maintenance crew uses repairs the wiring using the standard wiring practices manual. -The flight crew uses the fault reporting manual -The FIM says to install the LRUs. Use the (FRM) to find the fault code. maintenance manual to install the LRUs. -The flight crew writes the fault code and a brief -The FIM then gives the steps to verify the fault is description of the problem in the aircraft flight corrected. log. -The maintenance crew does a test of the LRU and the -The maintenance crew looks at the dispatch test shows the LRU is good. deviation guide and decides whether to fix or -The maintenance crew completes the paperwork and defer the problem. the job is complete. -For a fix, the maintenance crew uses the fault isolation manual (FIM) or the BITE manual to find the FIM task number. -In the BITE manual, the BITE procedure task numbers in the observed fault list have an asterisk (*) after the task number. Use the FIM or the BITE manual for tasks that have an asterisk. Use the FIM for tasks that do not have an asterisk. -The maintenance crew does the BITE procedure and gets a maintenance message from the BITE -The maintenance crew finds the FIM task number in a table in the FIM or BITE manual. -The FIM says to remove the interfacing LRUs and it references the maintenance manual removal and installation (R&I) section. -The maintenance crew use the maintenance manual R&I procedures to remove the LRUs. -The FIM then says to do a test of the wiring between the LRUs.
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737-600/700/800/900 TRAINING MANUAL
DO LRU TEST
AIRCRAFT FLIGHT LOG FAULT ISOLATION AND GET THE MAINTENANCE MESSAGE
MANUAL
FAULT REPORTING MANUAL DISPATCH DEVIATION GUIDE OR FIX OR TASK NUMBER
BITE
MANUAL
FLIGHT CREW DEFER THE
WRITE-UP PROBLEM
SYSTEMAIRPLANE SCHEMATICS STANDARD
MAINTENANCEFAULT ISOLATION
FAULT ISOLATION WIRING
MANUALMANUAL
MANUAL PRACTICES
MANUAL
WIRING
LOOK IN A TABLE REMOVE BOTH RESISTANCE CHECK DIAGRAMS
FOR TASK NUMBER LRU(S) ON DATA BUS WIRES REPAIR SPLICE
THEN DO THE TASK (ONE WIRE OPEN) (NO AIR DATA)
TROUBLESHOOT WIRING
(FOUND BAD SPLICE)
AIRCRAFT FLIGHT LOGAIRPLANE JOB
MAINTENANCEFAULT ISOLATION
FAULT ISOLATION COMPLETE
MANUALMANUAL
MANUAL
FINISH THE TASK LRU TESTS COMPLETERETURN TO THE FIM INSTALL THE LRU(S) AND VERIFY THE REPAIR
GOOD PAPERWORK MAINTENANCE DOCUMENTS - SCENARIO 2 - LOST INPUT TO LRU
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