What was found
SHORTLY AFTER TAKEOFF THE MAIN ROTOR TRANSMISSION CHIP LIGHT ILLUMINATED. THE AIRCRAFT TURNED AROUND AND LANDED BACK AT THE AIRPORT & MX WAS DISPATCHED TO THE AIRCRAFT. UPON INSPECTION OF THE MAIN ROTOR TRANSMISSION CHIP DETECTORS, MAINTENANCE PERSONNEL FOUND LARGE CHUNKS OF METAL THAT WERE OUT OF LIMITS. THE MAIN ROTOR TRANSMISSION ONLY HAD 1185.1 HOURS TSO. BELL HAS RATED THESE TRANSMISSIONS TO A 5000 HOUR TBO. THE MAIN ROTOR TRANSMISSION WAS REPLACED WITH A SERVICEABLE UNIT AND THE AIRCRAFT WAS RETURNED TO SERVICE WITH NO OTHER DISCREPANCIES NOTED AND NO OTHER ISSUES.