As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) PILOT REPORTED A STRANGE NOISE COMING FROM MAIN ROTOR TRANSMISSION WITH CHIP LIGHT ILLUMINATED. SUBSEQUENT INSPECTION FOUND EXCESSIVE METAL ON CHIP DETECTOR. THE TRANSMISSION WAS DISASSEMBLED ENOUGH TO FIND THE SOURCE OF THE METAL (OUTPUT BEVEL GEAR TOOTH). TRANSMISSION SENT TO MD HELICOPTER SERVICE CENTER FOR REPAIR.