What was found
AFT CABIN FLOOR STA 986 FLOORBEAM LBL 44 TO RBL 44 IS CORRODED AT FASTENER HOLES. GROUNDED - YES. REMOVED CORROSION ON FLOOR BEAM AT BS986.5, LBL44 - RBL44, ORIGINAL THICKNESS 0.150, REMOVED 0.047, REMAINING 0.103 FOUND TO BE OUT OF LIMITS IAW B737-800 SRM 53-70-51-1A-1. REMOVED UPPER FLANGE AND ACCOMPLISHED A CATEGORY "A" REPAIR FROM LBL52 RBL52, BS986.5 IAW B737-800 53-70-51-2R-4 REPAIR 4. DOT F498 REMOVED.