What was found
MAIN CABIN AFT WET AREA, STA 987 LBL43 FLOORBEAM T-CAP UPPER SURFACE CORRODED @ DOME NUT. GROUNDED - YES. REMOVED CORROSION ON THE FLOOR BEAM AT STA 986.5 UPPER SURFACE AT LBL 44 IAW B737-800 SRM 51-10-02. ORIGINAL THICKNESS 0.150, REMOVED 0.019, REMAINING THICKNESS 0.131 AND FOUND TO BE OUT OF LIMITS IAW B737-800 SRM 53-70-51-1A-1. REPAIRED AREA BY FABRICATED REPAIR ANGLE WITH PERMANENT FASTENERS IAW ASA EA# 800-53EA-21436 REV 00. THIS IS A CATEGORY "A" REPAIR.