As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LT WING UPPER REAR SPAR CAP WS178, AT NACELLE AFT ATTACH PLATE. DISSIMILAR METAL CORROSION ATTACK UPPER CROWN AND VERTICAL LEG. CORROSION WAS VISUALLY DETECTED AT DEPOT LEVEL SCHEDULED INSPECTION. CORROSION WAS FOUND TO EXCEED NEGLIGIBLE DAMAGE LIMITS.