As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING PREFLIGHT, FOUND EVIDENCE OF CORROSION AT LEFT WING LEADING EDGE LOWER SURFACE AT XFS 207.159. CORROSION FOUND IS BEYOND LIMITS. CUT OUT DAMAGED AREA. FABRICATED DOUBLER OF CLAD 7075-T6 .071 AND INSTALLED PER DER EO ARW 950037. FOUND LEVEL II CORROSION. (W)