As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 5781 - DURING CVG APPROACH RECEIVED A LEFT ENGINE OIL PRESSURE MESSAGE ALONG WITH A SLOWLY DECREASING FLUCTUATING OIL PRESSURE READOUT. CREW DECLARED AN EMERGENCY AND PERFORMED AN IN-FLIGHT SHUT-DOWN OF THE LEFT ENGINE. FLIGHT LANDED SAFELY WITHOUT INCIDENT. REPLACED CHAFED OIL TANK RETURN LINE.