What was found
DURING C16 CHECK DISCOVERED A CRACK, .9 INCHES IN LENGTH, ON THE BOTTOM OF THE NR 1 SLAT LOWER SKIN, BELOW CENTER AUXILIARY TRACK, AT SS 339. MAINTENANCE REMOVED THE DAMAGED PART OF SKIN FROM THE BOTTOM OF THE NR 1 SLAT LOWER SKIN AT SS 339 IAW BOEING 737-300 SRM 57-43-01-2. FABRICATED FILLER AND SPLICE PLATE IAW BOEING 737-300 SRM 57-43-01-2. INSTALLED FABRICATED REPAIR PARTS AT BOTTOM OF THE NR 1 SLAT LOWER SKIN, BELOW CENTER AUXILIARY TRACK, AT SS 339 IAW BOEING 737-300 SRM 57-43-01-2.