As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER REMOVAL OF LEFT OVERWING FLOOR PANELS FOR WIRING INSPECTION ACCESS FOUND CENTER WING TANK LEFT UPPER TORQUE BOX SKIN APPROXIMATELY AT STA Y1371, XCW113 WITH EXFOLIATION CORROSION. REPAIR CARRIED OUT AS PER FEDEX EA NR 15710-122479, TITLE: WINGS CENTER WING AFT UPPER SKIN CORROSION REPAIR. REPAIR CLASSIFIED AS MAJOR PER GMM 6-2-100.