As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DESCENDING THROUGH FL300 WE GOT AN OILY ODOR. ISOLATED TO PACK 1. DESCRIPTION OF ODOR/FUMES: PERSISTENT, OIL/OIL BURNING SMELL. APPARENT CABIN SOURCE: CABIN AIR SUPPLY VENTS. FLIGHT DECK. NO VISIBLE SMOKE/HAZE. NO MEDICAL ATTENTION REQUIRED.-ITEM CREATED TO ALLOW RTS FOR FERRY TO MCO. REOPEN THIS ITEM ON ARRIVAL MCO