As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING APPROACH TO A BOAT WITH AN EXTERNAL LOAD, THE AFT COUPLING OF THE NR 4 TAIL ROTOR DRIVESHAFT SEGMENT DEBONDED FROM THE SHAFT CAUSING A TAIL ROTOR FAILURE. THIS IS THE SECOND SUCH FAILURE WITH THE SAME AIRCRAFT. PREVIOUS FAILURE WAS REPORTED ON MALFUNCTION OR DEFECT REPORT DATED APRIL 26, 1994.