What was found
MCN - DURING C18 CHECK DISCOVERED, 4 CRACKS IN THE NR 2 SLAT SKIN BELOW THE INBOARD AUXILIARY TRACK, FROM SS 90 TO SS 164. MAINTENANCE REMOVED DAMAGED AREA OF NR 2 SLAT SKIN BELOW THE INBOARD AUXILIARY TRACK, FROM SS 90 TO SS 164 IAW BOEING 737-300 SRM 57-43-01-2. FABRICATED FILLER AND SPLICE PLATE IAW BOEING 737-300 SRM 52-43-01-2 FIG 206. INSTALLED FABRICATED REPAIR PARTS ON THE NR 2 SLAT SKIN BELOW THE INBOARD AUXILIARY TRACK FROM SS 90 TO SS 164 IAW BOEING 737-300 SRM 57-43-01-2 FIG 206.