As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PRECAUTIONARY SHUTDOWN OF NR 3 ENGINE DUE TO LOW OIL PRESSURE INDICATION, 30 PSI IN FLIGHT, 13 PSI ON SHUT DOWN. MAINTENANCE FOUND OIL RETURN LINE LEAKING. LOOSENED AND RETIGHTENED B-NUT. LEAK CHECK GOOD. NR 3 ENGINE OIL PRESSURE OPS CHECK GOOD ON GROUND RUN.