As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CENTER WING UPPER SKIN SURFACE ABOVE UPPER AUX TANK CORRODED. LOCATION FROM STA 1235 LT X =13 TO RT X =5. CENTER WING UPPER SKIN SURFACE ABOVE UPPER AUX TANK STA 1235 LH X = 13 TO RT X = 5. CORRODED AREA CARRIED OUT REPAIR IAW EA 1-5710-74294, WINGS - CENTER WING UPPER PANEL SKIN CORROSION.