What was found
DURING HEAVY MAINTENANCE VISIT, CORROSION WAS REPORTED AT ONE LOCATION ON THE LT WING, UPPER SKIN PANEL, LOWER SURFACE, T/E BETWEEN RIBS 14-15, REAR SPAR DATUM. REMOVED CORROSION BY BLEND OUT, PERFORMED NDT AND REPLACED FASTENERS WITH THE BLENDED AREAS AS OVERSIZED. REPAIR ACCOMPLISHED UNDER EC A14-208-04.