What was found
MAIN CABIN BS 1200 FLOOR BEAM HAS AREAS OF CORROSION ON UPPER SURFACE BETWEEN BL0 AND LBL 24. REMOVED CORROSION AT MAIN CABIN BS 1200 FLOOR BEAM ON UPPER SURFACE BETWEEN BL0 AND LBL 24 IAW B 757 SRM 51-10-02-OG.EVALUATED AREAS ORIG MAT .125" LOWEST READING .035" FOUND OUT OF LIMITS IAW B 757 SRM 53-00-51-1A FIG 101 DETAIL IV. CUT OUT DAMAGED FLOOR BEAM UPPER CHORD AT BS 1200 BETWEEN LBL 70" - RBL 10.5" DIM 81.5/8" FABRICATED AND INSTALLED NEW FLOOR BEAM UPPER TEE CHORD REPAIR. DIM 88" LONG AND REPAIR SPLICE IAW B 757 SRM 53-00-51-2R REPAIR 8 FIG 201 DETAIL II .