What was found
DURING D-CHECK, FOUND WING CENTER SECTION LOWER SKIN HAS EXTERIOR CORROSION BULGE/CRACK AT RT EDGE BOLTS BL 70 INCHES R AT 38 INCHES AFT OF FRONT SPAR. REMOVED CORROSION AS PER SRM 51-10-6. ULTRASONIC INSPECTED TO DETERMINE MATERIAL REMOVED. HFEC INSPECTION FASTERNER HOLES, NO CRACKS NOTED. COLD WORKED HOLES AND INSTALLED DOUBLER PER BOEING DRAWING 65C36586 DIM 16 INCHES BY 7 INCHES 2024-T3 .125.