As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
VHHH - DURING CRUISE FLIGHT, NR 4 ENGINE HAD LOW OIL QTY REQUIRING PRECAUTIONARY ENGINE SHUTDOWN. OIL PRESSURE FLUCTUATED INTO CAUTION RANGE. ENGINE NR 4 WAS SHUTDOWN IN FLIGHT. INSPECTED NR 4 ENGINE FOR OIL LEAKS PER MM. FOUND HYDRAULIC PUMP DRIVE SEAL LEAKING. REPLACED SEAL PER MM, RUN UP LEAK CHECK WAS GOOD. (M)