As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE IN HEAVY MX PERFORMING INSPECTIONS IT WAS NOTED THAT THE NR 3 SLAT INBD TRACK L/E CRACKED. STOP DRILLED CRACK, PERFORMED HFEC FOR VERIFICATION OF CRACK CONTAINMENT. FABRICATED REPAIR DOUBLER AND FILLER. INSTALLED REPAIR, NO OTHER DEFECTS WERE NOTED. ACFT WAS RETURNED TO SERVICE.