As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING A ROUTINE 2,000 HOUR INSPECTION, THE FUEL TANKS ARE REMOVED. THE LEFT INBOARD TANK (P/N-D64-2817-21-00 HAD EVIDENCE OF A LEAK. A SMALL CRACK WAS FOUND ALONG THE MARGIN OF ONE OF THE SPOT WELDS ON THE TANK SURFACE. THIS HAS HAPPENED ON THREE OTHER FLEET AIRCRAFT. DURING DISCUSSIONS WITH OTHER OPERATORS, THEY TOO HAD CRACKS AT THE EDGES OF THESE SPOT WELDS ON THE INBOARD TANKS.