What was found
MCN - MAJOR REPAIR - DURING C16 CHECK DISCOVERED 4 CRACKS, 1.0 INCHES IN LENGTH, ON THE NR 1 LOWER SLAT SKIN BELOW THE CENTER AUXILIARY TRACK FROM SS 298L TO SS 302L. MAINTENANCE CUT OUT DAMAGED AREA ON THE NR 1 LOWER SLAT SKIN IAW BOEING 737-300 SRM 57-43-01-2R6 FIG 201. FABRICATED FILLER AND SPLICE PLATE IAW BOEING 737-300 SRM 57-43-01-2R6 FIG 201. INSTALLED FABRICATED REPAIR PARTS ON THE NR 1 LOWER SLAT SKIN FROM SS 298L TO SS 302L IAW BOEING 737-300 SRM 51-43-01-2R6.