What was found
PILOT REPORTED THAT DURING CRUISE FLIGHT FROM TJIG TO TJCP LEFT ENGINE OIL PRESSURE STARTED DROPPING AND AFTER A FEW SECONDS PROPELLER FETHERED BY ITSELF AND ENGINE SHUT DOWN. PILOT PERFORMED ENGINE FAILURE PROCEDURE AS PER FLIGHT MANUAL AND DIVERTED TO TJRV AIRPORT, LANDING SAFELY WITHOUT ANY OTHER ISSUES. ENGINE WAS INSPECTED AND FOUND A DAMAGED REAR CRANKSHAFT IDLER GEAR. ENGINE WAS REMOVED AND ANOTHER ENGINE INSTALLED, GROUND RUN UP AND LEAK CHECK PERFORMED, NO DISCREPANCIES FOUND, ALL INDICATION NORMAL.