As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 4 ENGINE LOW OIL PRESSURE LIGHT CAME ON ACCOMPANIED BY AN OIL PRESSURE FLUCTUATION AND QUANTITY DECREASING. ENGINE WAS SECURED AND OIL PRESSURE WAS BELOW 5 PSI WITH ENGINE WINDMILLING AT 30 PERCENT N2 FOR REMAINED OF FLIGHT. REPLACED THE NR 4 ENGINE. RUN UP/TRIM CHECK IAW DC-8 A/B.