What was found
(CAN) IT WAS REPORTED TO BELL (IN 2 STEP): -FEB 12TH:CUSTOMER HAD A CHIP LIGHT EVENT IN FLIGHT, CLEANED THE CHIP DETECTORS, REPLACED THE OIL AND FILTER, AND PERFORMED A PENALTY RUN. THE AIRCRAFT THEN DEPARTED AND LANDED BECAUSE OF A SECOND CHIP EVENT, ROUGHLY 8 HOURS AFTER THE SERVICING HAD BEEN ACCOMPLISHED. THE AIRCRAFT WAS TRUCKED FOR REPLACEMENT OF THE MAST AND TRANSMISSION -FEB 8TH:FROM APPROVED MAINTENANCE ORGANIZATION: WE RECEIVED TRANSMISSION ASSEMBLY PART NUMBER 407-040-006-111. IT WAS REMOVED FROM THE AIRCRAFT FOR INSPECTION DUE TO METAL IN THE OIL. DURING THE INSPECTION, WE FOUND A PIECE OF GEAR TOOTH FROM THE BEVEL GEAR PART NUMBER 407-040-035-101.