As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURNING ANNUAL INSPECTION , TAIL FIN FABRIC WAS FOUND BUCKLING APPROX 1 INCH AFT OF TOP LEADING EDGE. UPON FABRIC REMOVAL FOR HIDDEN DAMAGE INSPECTION THE FIN RIB WAS FOUND TO BE CRACKED AND BUCKLED AT FWD ATTACHING WELD. FURTHER INSPECTION REVEALED AFT ATTACHING WELD TO BE CRACKED ALSO, SUSPECTED CAUSE TO BE EXCESSIVELY TIGHTENED DRAG WIRES.