What was found
MCN - DURING C16 CHECK, DISCOVERED 5 CRACKS, .250 INCHES IN LENGTH, ON BOTTOM SURFACE OF THE NR 1 SLAT, BELOW OUTBOARD MAIN TRACK AT SS 356L. MAINTENANCE CUT OUT AND REMOVED DAMAGED SKIN FROM THE NR 1 SLAT, BELOW OUTBOARD MAIN TRACK AT SS 356L IAW BOEING 737-300 SRM 57-43-01-2 FIG 206. FABRICATED SPLICE PLATE AND FILLER IAW BOEING 737-300 SRM 57-43-01-2 FIG 206. INSTALLED FABRICATED REPAIR PARTS AT THE NR 1 SLAT, BELOW OUTBOARD MAIN TRACK AT SS 356L IAW BOEING 737-300 SRM 57-43-01-2 FIG 206.