As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MAJOR REPAIR - DURING ROUTINE SCHEDULED MAINTENANCE DAMAGE ON THE LEFT AFT AUXILIARY FUEL TANK WALL WAS DISCOVERED. MAINTENANCE REMOVED AFT WALL OF THE LEFT HAND AUX FUEL TANK. FABRICATED NEW, ALODINED AND PRIMED. REINSTALLED AFT WALL PER EO 09-UE165-02.