As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AN EXCESSIVE ODOR OF BURNING OIL IS PRESENT THROUGHOUT CABIN. FOUND APU OIL OVER SERVICED. REMOVED 0.5 CAPS OIL TO BRING APU OIL TO SERVICEABLE LEVEL. INSPECTED AND CLEANED AIR DELIVERY LINES FROM WATER SEPERATOR LEFT SIDE TO THE PERSSURE BULKHEAD. REPLACED FWD ECU BYPASS VALVE CONTROLLER (ANTI-ICE) WITH REPAIRED UNIT. OPS CHECK GOOD AND NO ODOR OF BURNING OIL PRESENT AT THIS TIME. DONE IN REF- TO CE-750 MM 21-51-00 AND 21-52-00.