As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER REACHING CRUISE ALT NR 4 ENG OIL QTY DROPPED TO JUST ABOVE 1 GAL ON IND, ALL OTHER IND OK. OIL QTY SLOWLY DECREASED TO ZERO AT 5.5 HOURS INTO FLT, THEN PRESS FLUCT, AT 8 HRS LOW OIL PRESS LIGHT CAME ON AND ENGINE SHUTDOWN. CSD CARBON SEAL LOCATED ON THE MAIN GEARBOX WAS FOUND TO BE DAMAGED. CARBON SEAL WAS REPLACED.