As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING A DAILY INSPECTION, THE TECH HEARD AN UNUSUAL NOISE WHILE TURNING THE TAIL ROTOR BY HAND. INVESTIGATION REVEALED THAT A TAIL ROTOR DRIVESHAFT FLEXIBLE COUPLING IN THE VERTICAL FIN HAD FAILED AND ALL 7 LAMINATES HAD BROKEN AT 1 AREA OF THE COUPLING.