As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF CREW OBSERVED DECREASING OIL QUANTITY ON NR 2 ENGINE, SHUTDOWN ENGINE. AN UNEVENTFUL LANDING ACCOMPLISHED. INSPECTION REVEALED CUT AND EXTRUDED O-RING ON PRESSURE OIL FILTER. REPLACED O-RING, SERVICED ENGINE AND ACCOMPLISHED HIGH POWER RUN. 12.5 FLIGHT HOURS LATER SAME OCCURANCE IN SAME STAGE OF FLIGHT. REMOVED AND REPLACED OIL FILTER HOUSING. (M)