What was found
LCQ - MAJOR REPAIR - DURING C-10 CHECK INTERGRANULAR CORROSION WAS FOUND ON FLOOR BEAM UPPER CAP AT BS 1640, LBL 60. MAINTENANCE REMOVED CORROSION AND FOUND MATERIAL LOSS TO BE OUT OF LIMITS; REMOVED CORRODED TEE CHORD BS 1640, LBL 65 TO RBL 55; FABRICATED A NEW REPLACEMENT TEE CHORD, 2 EACH REPAIR ANGLES, AND 2 EACH REINFORCEMENT STRAPS; AND INSTALLED REPAIR PARTS IAW B757-200 SRM 53-00-51, FIG. 210.