What was found
DURING AN MBV INSPECTION, THE LEFT FLOORBEAM AT FRAME 20 WAS FOUND TO BE CORRODED BELOW SRM LIMITS. CUT OUT DAMAGE OF LEFT FLOORBEAM, CLEANED AND TREATED THE REPAIR AREA. FABRICATED AND EXTERNAL ANGLE, FILLER, PLATE AND SHIMS. REPAIR DONE IAW EMB SRM, SRM EMB 145/1142 REV 21, CHAPTER 53-21-10 FIG 201. (M)