As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 6409 JFK-SAL, ON HEAVY MAINTENANCE CHECK FOUND CORROSION ON TOP SKIN PANEL 2 LOWER SURFACE AT LEVEL RIB 7 TRAILING EDGE LEFT WING AND CORROSION ON TOP SKIN PANEL LOWER SURFACE ON LEVEL RIB 14 TRAILING EDGE LEFT WING. ACCOMPLISHED REPAIR OF THE LEFT WING - WING BOX MAIN STRUCTURE SKIN AND PLATING TOP SKIN PANEL 2 TRAILING EDGE OVERHANG CORROSION SPOTS IAW EC A12-135-01.