As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
COROSION ON CTR WING AUX TANK TOP PANEL SURFACE AT STA 1239 TO STA 1256, X =98 TO X =107. CORROSION REMOVED AS PER SRM 51-21-01 REV 47. ORIGINAL MATERIAL THICKNESS = 0.247 INCH; MATERIAL REMOVED = 0.017 INCH; MATERIAL REMAINED = 0.230 INCH - FOUND EXCEEDED LIMIT AS PER SRM 57-10-01 REV 47, FIGURE 101. ACCOMPLISHED EA 1-5710-149871. REPAIR CLASSIFIED AS MAJOR PER GMM 6-2-100 REV 113.