As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CHECK-C MAINT, THE LEFT WING NUMBER 3 LE SLAT, TOP SIDE AT OTBD END, FOUND THE PATCH COVER HAD COME OFF OF THE METAL SURFACE. INSTALLED A 3.5 INCH IN BY 5.5 IN HOT BOND REPAIR PER BOEING SERVICE BULLETIN 767-57A0057 REV 2, AND SRM 51-70-10.