What was found
SPOT OF CORROSION LOCATED AT MAIN CABIN FLOOR BEAM STA. 987 UPPER SURFACE AROUND FASTENER HOLE, APPROX. LBL 43. AREA MARKED IN RED. GROUNDED - YES. CORROSION FOUND TO BE OUT OF LIMITS REF B737-800 SRM 53-70-51. ORIGINAL THICKNESS IS .150, REMAINING IS .141, .009 WAS REMOVED. ACCOMPLISHED CATEGORY "A" REPAIR BY CUTTING OFF THE UPPER TEE CHORD THEFULL LENGTH OF THE 986.5 FLOOR BEAM LBL 60 - RBL 60 AND ACCOMPLISHING REPAIR REF B737-800 SRM 53-70-51-2R-4 REPAIR 4.