As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING C-18 CHECK THE NR 1 SLAT TRAILING EDGE UPPER SKIN WAS FOUND DELAMINATED AT OUTBOARD AUXILIARY TRACK. MAINTENANCE REMOVED DAMAGED NR 1 SLAT TRAILING EDGE UPPER SKIN; FABRICATED A DOUBLER AND FILLER; INSTALLED REPAIR PARTS IAW B737-300 SRM 51-70-10, FIG. 16, PG. 67-69.