As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
COROSION ON CENTER WING AUX TANK TOP PANEL SURFACE AT BS 1219 TO 1239, X = 8 TO X = 27.7. COROSION REMOVED AS PER SRM 51-21-01 REV 47. ORIGINAL MATERIAL THICKNESS = 0.172 INCH; MATERIAL REMOVED = 0.052 INCH; MATERIAL REMAINED = 0.120 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.