What was found
DURING SCHEDULED PHASE IN C-CHECK, A INCORRECT STATIC WICK BASE WAS FOUND INSTALLED ON THE LEFT WING TIP. DURING REMOVAL FOUR .1875 INCH FASTENERS HOLES WERE LEFT. THE DAMAGED AREA WAS REMOVED A FILLER WAS FABRICATED USING SAME MATERIAL AS REMOVED. THE FILLER WAS THEN WELDED AS PER BOEING SPEC BAC5975. THE BARE AREA WAS THEN TOUCHED UP WITH A TOP COAT TO MATCH EXISTING FINISH. REPAIR ACCOMPLISHED IAW AIA EDR B2-06366. NON ROUTINE 51856. (M)