As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ODORS IN THE COCKPIT DURING FLIGHT WITH APU RUNNING. SMELLS LIKE BURNED OIL. INSPECTED THE APU INLET AND EXHAUST, APU BLEED AIR DUCT AND HEAT EXCHANGER DUCT, WATER SEPERATOR AND CLEANED WATER SEPARATOR SOCK IAW MM 12-19-02. REINSTALLED WATER SEPERATOR AND PLUMBING IAW MM 21-21-00. RAN APU FOR 45 MINUTES WITH ENGINES RUNNING FOR TEN MINUTES. NO OIL ODOR NOTED. LEAK AND OPERATIONAL CHECKED GOOD.