As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING FLIGHT AT CRUISE, LOW FUEL PRESSURE AND LOW OIL PRESSURE WARNING LIGHTS CONFIRMED LOW OIL PRESSURE ON GAGE. OIL WAS NOTED COMING OUT OF EXHAUST. CREW SHUT DOWN ENGINE. DURING TEARDOWN, ACCESSORY GEARBOX COUPLING WAS FOUND SHEARED, SUGGESTED COUPLING SHEARED OWED TO A MS927609 NUT THAT CAME LOOSE AND JAMMED BETWEEN GEARS.