As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE UPPER LT EXTERNAL SURFACE OF THE CENTER WING FUEL TANK HAS AREAS OF CORROSION FROM BS 696 TO 737, LBL 30 TO FUSELAGE SKIN. AREAS MARKED. REF 63165-0100-0187. BLENDED AND REMOVED CORROSION ON UPPER SKIN IAW SRM 57-10-01. MATERIAL REMOVED .010 IN SKIN IS WITHIN LIMITS IAW 57-10-01, FIG 108.