As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FWD TAIL ROTOR HANGER BEARING FAILED. SAFETY STRAP WAS THE ONLY THING HOLDING DRIVESHAFT IN PLACE. PILOT AND CREW NOTICED A MOMENTARY KNOCKING NOISE AFTER NR 1 ENGINE AT IDLE ONLY. CONTACTED BELL PRODUCT SUPPORT AND REPLACED HANGER BEARING ASSY. AFTER INSPECTION.