As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CRUISE BEFORE TD A MIST AND THE ODOR OF OIL WAS ENCOUNTERED IN THE CABIN. THE RT PACK WAS TURNED OFF AND THE MIST AND ODOR QUICKLY DISAPPEARED. OPERATED RT PACK WITH APU IAW AMM 21-00-00 COULD NOT DUPLICATE OIL MIST OPERATED WITH TRIM AIR OPEN NO OIL MIST RT PACK OPS NORMAL.