As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ONE OF THE 4 BOLTS HOLDING THE REAR ATTACHMENT BRACKET ON VERTICAL STABILIZER, HAD A BROKEN/ SPLIT NUT. PROBABLE CAUSE COULD HAVE BEEN FROM CORROSION FOUND BETWEEN THE NUT AND WASHER CAUSING STRUCTURAL LOSS OF THE NUT. INSPECTED NUTS FOR CORROSION AND REPALCED AS NECESSARY WITH A SOLID TYPE SELF-LOCKING NUT.