As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FOUND DURING INSPECTION, THE FORWARD TAIL ROTOR DRIVESHAFT WAS FOUND TO HAVE A DEEP GROOVE WORN INTO THE TUBE NEAR THE END OF THE SHAFT EXCEEDING THE MECHANICAL DAMAGE LIMITS. DAMAGE WAS CAUSED BY LOOSE REINFORCING WIRE FROM A NEARBY SCAT TUBE FOR THE AIR CONDITIONING DUCT. THE DUCT HAD SEPARATED EXPOSING THE WIRE.