What was found
MDCC FLOORBEAM, BETWEEN FRAME 11 & 13, LT SIDE UNDERNEATH LAVATORY MODULE HAS CORROSION ON SEVERAL SPOTS. REMOVED CORROSION IAW SRM 51-74-10, AFTER REWORK L=1.3" W=1.0" & D=0.040" IS FOUND TO BE OUT OF LIMITS IAW SRM 53-10-16. FABRICATED NEW FLOOR SUPPORT ON T15 177719 PN FX-153612214200. INSTALLED NEW FLOOR SUPPORT IAW SRM 51-40-21 CAT A MAJOR REPAIR.