What was found
DURING C-CHECK, CORROSION FOUND ON THE RT WING LOWER SKIN FRONT SPAR CAVITY UPPER SURFACE, FSSO 1188 - 1197. AFTER REMOVING ATTACHED FITTING, PERFORM AN HFEC SURFACE AND OPEN HOLE INSPECTION. TO VERIFY NO DAMAGE EXISTS. THE BLENDED OUT DIMENSIONS ARE 2.5IN (W) X 11IN (L) WITH A MAX. TAPERED BLEND OF 0.181IN ON THE NON-PADDED AREA. MAKE A PERMANENT REPAIR IAW THE INSTRUCTIONS OF EO 744-57-20-0005/BOEING CHI-TPE-03-00283H.