What was found
(CAN) IN CRUISE AT FL 290 TRIPLE CHIME ENG OIL ENGINE LIGHT ON INSTRUMENT CREW ALERTING SYSTEM, LIGHT ON ENG OIL PRESSURE LOW AT 30-34 PSI, AND FLUCTUATING ENG MONITORED, QUICK REFERENCE HANDBOOK DRILL CARRIED OUT, AND FLIGHT DIVERTED. AFTER LANDING ENGINE SHUT DOWN. ENGINE CHANGED.