What was found
LCQ - MAJOR REPAIR - DURING C-06 CHECK A 1/2" CRACK WAS FOUND EMANATING FROM LIGHTNING HOLE ON CABIN FLOOR WEB AT LBL 24, BS 660 - 680. MAINTENANCE CUTOUT DAMAGED PORTION OF WEB, FABRICATED A REPAIR DOUBLER, AND INSTALLED REPAIR PART IAW B757-200 SRM 51-70-13, FIG. 1, PG. 1-2.