As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EXPERIENCED FUME EVENT DURING CRUISE. BURNING RUBBER SMELL IN FLIGHT DECK OCCURED 11 MINUTES INTO FLIGHT AND REMAINED UNTIL LANDING. CORRECTIVE ACTION: FOUND ENGINE 1 OIL OVERSERVICED TO 19 QT DRAINED DOWN OIL TO WITHIN SERVICEABLE LIMITS. PERFORMED TSM 05-50-00-810-831-A. INSPECTED RECENT MX ACTIONS AROUND ENGINE 1 FUEL NOZZLES. NO EVIDENCE OF LEAKS NOTED. NO OTHER DEFECTS NOTED AT THIS TIME, REF TSM 05-50-00-810-831-A.