What was found
DURING A ROUTINE C-CHECK INSPECTION FOUND FLOORBEAM CORRODED AFT CARGO COMPARTMENT AT STA FS 1520.000. A MAJOR REPAIR WAS PERFORMED. REMOVED THE CORRODED AREA AND FOUND OUT OF LIMITS IAW DC8 SRM 51-1-8 PG 17, 18 AND SRM 53-2-0 PG 2P. FABRICATED FILLER ( AL 7075 T6 0.425) + REPAIR ANGLE (EXTENSION 7075 T6 511 0.150) IAW DC8 SRM 51-2-1 PG 1 SHEET. CLEANED, TREATED AND PRIMED AREA, FILLER REPAIR ANGLE IAW DC8 SRM 51-1-8B. APPLIED PRC SEALANT ON FAYING SURFACE IAW DC8 SRM 51-1-11 PG 9. INSTALLED FILLER REPAIR ANGLE WITH NEW FASTENERS IAW DC8 SRM 51-2-1 FIG 18-14 SHEET IAW DC8 SRM 51-1-21 PG 1 DC8 SRM 51-1-20D PG 9.