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 DURING CRUISE, OIL PRESSURE GAUGE READ 240 PSI, FOR GEARBOX, 50 PSI FOR ENGINE, QUANTITY AT 10.5 GAL AND OIL TEMP AT 80 DEG. SHUTDOWN ENGINE AS PRECAUTIONARY AND LANDED WITHOUT INCIDENT. FOUND LIGHT SOCKET ON OIL PRESSURE INDICATOR LIGHT SOCKET DEFECTIVE. REPLACED SOCKET SYSTEM, OPS CHECKED GOOD PER MM CH 79.