What was found
CMH - PILOT REPORTED WHILE ON FINAL APPROACH TO CMH, LEFT ENGINE LOW OIL PRESSURE LGHT ILLUMINATED ALONG WITH A LOSS OF OIL PRESSURE ON LEFT GAUGE. THE LEFT ENGINE WAS SHUT DOWN. UPON INSPECTION BY MAINTENANCE, THE 90 DEGREE ELBOW ON THE LEFT PROP GOVERNOR WAS FOUND CRACKED IN HALF. THE ELBOW WAS REPLACED AND A FUNCTIONAL CHECK OF THE SYSTEM PERFORMED WITH ALL INDICATIONS NORMAL AND NO LEAKS NOTED.