As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AT FL330 MASTER CAUTION LOW OIL PRESS RIGHT ENG. RAN QRH, 0 QUANTITY, THEN SHUT DOWN R ENGINE. R PRESSURE AND QUANTITY BOTH 0. WINDMILL 15 MINUTES. UPON ARRIVAL FOUND LOWER COWL COVERED WITH OIL. FOUND LOOSE STUD/NUT ON OIL FILTER CAP W/O-RING PROTRUDING. WIP DC 611518. REPLACED NUMBER 2 ENGINE ON A/C LOG 0477901.