What was found
MAIN CABIN AFT WET AREA, FLOOR BEAM CORRODED ON UPPER SURFACE AT BS 947.5 BETWEEN LBL-30 AMD RBL-10. MARKED. GROUNDED - YES. CORROSION IS LOCATED ON A PREVIOUS T-CAP REPAIR. CORROSION FOUND TO BE OUT OF LIMITS DUE TO BEING LOCATED AT A HARD MOUNT ATTACHMENT LOCATION IAW B737-800 SRM 53-70-51-1A-1. REMOVED PREVIOUS T-CAP REPAIR AND ACCOMPLISHED T-CAP REPAIR IAW B737-800 SRM 53-70-51-2R-5. (FLOOR BEAM REPAIR). THIS REPAIR IS A CATEGORY "A" REPAIR REMOVED DOT.