What was found
DURING C-CHECK IN GSO FOUND MAIN CABIN AT APPROX STA 430, AT RBL 10, FLOOR SUPPORT CORRODED. RECEIVED FLOOR SUPPORT P/N ABA8225-503 PO 541338, REMOVED OLD SUPPORT. LOCATED AND DRILLED NEW SUPPORT IAW SRM 51-31-01 VOL II. INSTALLED FLOOR SUPPORT AND DOOR JAMB PER 51-31-01 VOL II. BLENDED CORROSION, FOUND OUT OF LIMITS IAW SRM 51-21-01 VOL II AND 53-00-01 VOL I.