What was found
DURING ROUTINE C CHECK INSPECTION, FOUND IN AFT CARGO COMPARTMENT FLOORBEAM UPPER FLANGE SHOWS CORROSION AT STATION 1520.000 RIGHT BOTTOM LINE 44". REMOVED DAMAGED AREA. FABRICATED NEW SKIN. CLEANED, TREATED AND PRIMED AREA AND REPAIR PARTS. APPLIED SEALANT TO FAYING SURFACES INSTALLED REPAIR PART IAW DC8 SRM 51-1-21 IAW DC8 SRM 57-7-1 FIGURE 1 PAGE 2 ITEM "F", DC8 SRM 57-1-0 PAGE 1 DC8 SRM 51-1-8B, AND, DC8 51-1-11.