As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING MAJOR REPAIR OF TAIL BOOM, FOUND EXIT DUCT ASSY VERTICAL CRACK APPROXIMATELY 1.25 INCHES LONG ON FORWARD SIDE OF FLANGE. SUSPECT CAUSED BY VIBRATION FROM SEVERE CRACK ALONG EXHAUST EJECTOR 12 INCHES LONG ALONG WELDED BEAD FROM FORWARD TO AFT SIDE OF EJECTOR. LIMIT THE NUMBER OF WELDS TO EJECTOR AND LENGTH.