As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) 2.5 INCH LONGITUDINAL CRACK FOUND ON LEFT SIDE OF TAILBOOM APPROXIMATELY 3 INCHES BELOW THE MOST REARWARD T/R DRIVESHAFT BEARING HANGAR (BS 146 APPROX). TAILBOOM WAS BEYOND LOCAL REPAIR AND SENT BACK TO BELL FOR REPAIR/REPLACEMENT. APPROX 4,000 HOURS ON THIS TAILBOOM.