What was found
MCN - MAJOR REPAIR - DURING C19 CHECK DISCOVERED 4 CRACKS, RANGING FROM .250 INCHES UP TO .500 INCHES IN LENGTH, ON THE BOTTOM NR 2 SLAT SKIN, BELOW THE OUTBOARD AUXILIARY TRACK. MAINTENANCE REMOVED THE DAMAGE FROM THE NR 2 SLAT SKIN 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 BOTTOM NR 2 SLAT SKIN IAW BOEING 737-300 SRM 57-43-01-2R6.