As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(AUS) REAR SPAR LOWER LT SPLICE PLATE / CENTER WING TANK BOLT BROKEN. THE BOLT SHANK WAS COMPLETELY SEVERED AND THE BOLT HEAD WAS PROTRUDING APPROXIMATELY 19.05MM (0.75IN) INTO THE CENTER WING TANK WITH SURROUNDING SEALANT DAMAGE EVIDENT. FOUND DURING INSPECTION IAW 747-028-0019.