As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER 27 MINUTES FLIGHT TIME, NR 3 ENGINE LOW OIL PRESSURE LIGHT ILLUMINATED. ENGINE WAS SHUT DOWN AT 13:45Z. UPON INSPECTION AT BRO, FOUND OIL PRESSURE RELIEF VALVE NOT REGULATING. REPLACED RELIEF VALVE. ENGINE OPS CHECK NORMAL IAW MM 79-32-0.