As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS IN FLIGHT WHEN NR 4 ENGINE OIL PSI AND QUANTITY WENT TO ZERO. CREW SECURED THE ENGINE AND LANDED IN MSP. CREW SHUTDOWN ENGINE, A/C DIVERTED TO MSP. OIL QUANTITY READ 0 OIL PSI BETWEEN 20 & 40 PSI N2 REMAINED AT APPROX 20 PERCENT. MAINTENANCE REMOVED & REPLACED NR 4 ENG P/N 2-003-040-15, S/N ON PO7742, OFF PO7864 IAW JOB CARD 7100-502 REF JOB CARD FOR OP'S & LEAK CHECKS.