What was found
CORROSION UNDER NUTPLATES AFT PIT MAIN CABIN FLOOR STRUCTURE BS 1681.8 FROM LBL 30 TO LBL 50 (3 EA.) REPAIRED CORROSION UNDER NUT PLATES IN AFT PIT MAIN CABIN FLOOR STRUCTURE BS 1681.8 FROM LBL 30 TO LBL 50. CUT OUT CORRODED SECTION OF CABIN FLOORBEAM, FABRICATED AND INSTALLED L ANGLE 19.250 BY 1.750 BY 1.250 AND 15.75 BY 1.750 BY 1.125 AND STRAPS 19 BY 1.25 AND 16.750 BY 1.25 ALL FROM 7075-T6 .040. FABRICATED AND INSTALLED 1 U CHANNEL FROM 7075-T6 .125 AND 1 EA FROM 7075-T6 .063, AND FABRICATED SHEAR WEB FROM 7075-T6 .025 IAW B757 DWG #146N5190, AND B757 SRM 53-00-51 FIG 201.