What was found
DURING M-CHECK, FOUND MAIN CABIN STA 200, RBL 1 TO RBL 20 FLOOR SUPPORT HAS CORROSION. FLOOR SUPPORT AT STA 200, RBL 1 TO RBL 20 FOUND TO BE OUT OF LIMITS IAW SRM 53-01, FIG 1. REMOVED FLOOR SUPPORT IAW SRM 51-30-5. FABRICATED NEW FLOOR SUPPORT FROM EXTRUSION PN 52652479 7075-T6, TRIMMED, LOCATED, DRILLED, TREATED, PRIMED AND INSTALLED IAW SRM 51-10-4, 51-10-2, 51-10-1 FIG 22, 51-10-3 AND 51-30-5.