As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MCN - DURING C15 CHECK DISCOVERED 4 CRACKS, .5 INCHES IN LENGTH, ON THE NR 1 SLAT SKIN BELOW THE OUTBOARD MAIN TRACK. MAINTENANCE TRIMMED OUT DAMAGED SKIN ON THE NR 1 SLAT IAW BOEING 737-300 SRM 57-43-01-2R FIG 201. FABRICATED FILLER AND SPLICE PATE IAW BOEING 737-300 SRM 57-43-01-2R FIG 201. INSTALLED REPAIR PARTS ON THE NR 1 SLAT SKIN BELOW OUTBOARD MAIN TRACK IAW BOEING 737-300 SRM 57-43-01-2R FIG 201.