As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MAIN ROTOR TRANSMISSION SENT IN FOR REPAIR DUE TO REPORTED CHIPS ON DETECTOR. TRANSMISSION OPENED AND APPR NR 2/3 OF TOOTH (CENTER PORTION) FOUND MISSING FROM INPUT GEAR. PIECE LOCATED INSIDE TRANSMISSION CASE. NO FURTHER DAMAGE NOTED.