What was found
MCN - DURING C19 CHECK DISCOVERED 2 CRACKS, 1.0 INCH, AT FASTENERS LOCATED ON THE NR 2 SLAT BELOW THE INBOARD AUXILIARY TRACK FROM SS 163L TO SS 165L. MAINTENANCE TRIMMED OUT DAMAGED AREA ON THE NR 2 SLAT IAW BOEING 737-300 SRM 57-43-01-2R6. FABRICATED FILLER AND SPLICE PLATE IAW BOEING 737-300 SRM 57-43-01-2R6. INSTALLED FABRICATED REPAIR PARTS ON THE NR 2 SLAT BELOW INBOARD AUXILIARY TRACK FROM SS 163L TO SS 165L IAW BOEING 737-300 SRM 57-43-01-2R6.