As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UPON INSPECTION OF AIRCRAFT, FOUND AFT FUSELAGE BULKHEAD IMPROPERLY RIVETED. RIVET HEADS CLEARLY HAVE DENTS ALMOST LOOKING LIKE WRONG SET WAS USED TO DRIVE RIVETS. MOST OF THE UPSET ENDS WERE NOT PROPERLY BURRED. ALL RIVETS WERE REMOVED AND REPLACED AND PROPERLY RIVETED.