What was found
CENTER FUSE I, UNDER FLOOR SKIN CORRODED BTW FRAME 17-19 AND STR 21R-21L. CENTER FUSE I, UNDER FLOOR SKIN BTW FRAME 17-18 AND STR 21R-21L BLENDED FOR INVESTIGATION. AFTER INVESTIGATION, CORROSION ON LOWER SKIN BTW FR 17-19 AND BTW STR 21L-21R FOUND OUT OF LIMITS. DURING THE INSTALLATON OF THE REPAIR DOUBLER, THE SKIN STARTED TO DO AN OIL-CANNING EFFECT AFT OF THE CUTOUT. SKIN REPAIRED IN CF BW FR17-19 AND STR 21L-21R PERFORMED. CORROSION LEVEL 1