As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER THE LAST FLIGHT OF THE DAY, INSP REVEALED TAIL ROTOR SPIDER ASSY LOSS OF TORQUE AT CASTELLATED NUT SECURING SPIDER ASSY. THIS FINDING PROMPTED REMOVAL AND REPLACEMENT OF SPIDER ASSY WITH SERVICEABLE COMPONENT. SPIDER ASSY P/N 350A33.2004.06. TT IN SERVICE 186.6 FLYING HRS SINCE -06 MODIFICATION C/W BY AMERICAN EUROCOPTER. POSSIBLE CAUSE OF LOSS OF TORQUE, UNKNOWN. RECOMMENDATION TO PREVENT RECURRENCE, INCREASE TORQUE VALVE AT CASTELLATION. (X)