What was found
ON THE PREVIOUS FLIGHT FROM DTW TO AUS, A BURNING ELECTRICAL ODOR WAS OBSERVED IN FLIGHT DECK ON CLIMB OUT FROM 5000-15000 AND THEN DISSAPATED. UPON ARRIVAL AND AFTER DISCUSSION WITH MCC, IT WAS DETERMINED THE PLANE WAS OKAY FOR SERVICE. DURING ENGINE START IN AUS. AFT FA'S AND PAX REPORTED A BURNING RUBBER ODOR. THIS WAS DURING ENGINE START USING APU BLEED. WE SWITCHED TO ENG BLEED AIR TO CLEAR THE ODOR AND IT WEAKENED BUT DID NOT DISSAPATE. NO SMOKE PRESENT BUT ODOR LINGERED UNTIL SHUTDOWN. DEBRIEFED FLIGHT CREW AND SMOKE AND FUMES REPORT. PERFORMED GVI OF APU, NO FINDINGS. C/W W/C 0550-2002 FAM. DETERMINDED TO BE TYPE 9, C/W ALL STEPS IN FIGURE 1 AND 4. NO FAULTS FOUND. RAN ENG 1 & 2, ISOLATED ALL BLEED SOURCES AND BOTH PACKS, NO FAULTS NOTED. R&R RECIRC FILTERS AS PER AMM 21-21. MCC CONFERENCE CALL C/W. AC OK FOR SVC. (LP: 9439038, AIRCRAFT WAS GROUNDED)