As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING FLT HAD NR 1 LOW OIL PRESS/FILTER BYPASS LIGHT WITH 46 PSI OIL PRESS NR 1 ENG SHUTDOWN AS PER RED TABS. LIGHT CAME ON AT START OF DESCENT. MINOR VIBRATION NOTED DURING FLIGHT, BUT ALL INDICATIONS NORMAL UNTIL LIGHT CAME ON. FOUND METAL IN THE OIL SYSTEM. REMOVED AND REPLACED NR 1 ENGINE.