As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING C16 CHECK DISCOVERED, 2 CRACKS, .375 INCHES IN LENGTH, LOCATED ON THE BOTTOM OF THE NR 1 SLAT SKIN BELOW OUTBOARD MAIN TRACK. MAINTENANCE REMOVED CRACKS FROM NR 1 SLAT SKIN 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 THE BOTTOM OF THE NR 1 SLAT, BELOW OUTBOARD MAIN TRACK IAW BOEING 737-300 SRM 57-43-01-2.