As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE PERFORMING PREFLIGHT CHECK, PILOT NOTED THAT THE AFT MOST FLEXIBLE DISC PACK COUPLING ON THE TAIL ROTOR SEGMENTED DRIVESHAFTS AT THE INTERFACE WITH THE TAIL ROTOR GEARBOX WAS CRACKED. VERIFIED CRACKED COUPLING AND REPLACED WITH SERVICEABLE. PN: 407-340-340-103