As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED. FLIGHT CREW REPORTED AN OIL ODOR COMING FROM LEFT PACK DURING ALL PHASES OF FLIGHT. MAINTENANCE REMOVED AND REPLACED APU FLOW DIVIDER AND DRAIN VALVE ASSEMBLY PER AMM 49-32-12. ACCOMPLISHED TASK CARD 26L00021002 (APU SMELL IN CABIN), ACCOMPLISHED TASK CARD 26L00021004 (DECONTAMINATION OF THE ENVIRONMENTAL CONTROL SYS, ENG AND APU)