As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UPON REMOVAL OF THE LEFT LOWER RUDDER CLOSEOUT SKIN, THE INTERSPAR RIB WAS FOUND CRACKED ACROSS THE ENTIRE WIDTH OF THE RIB. THE DAMAGE TO THE RIB WAS A CLEAR INDICATION OF A CRACK CAUSED BY FATIGUE. THE DECREASED INTEGRITY ALSO CAUSED THE ATTACHING RUDDER SKIN TO CRACK.