As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) AIRCRAFT IN CLIMB PHASE OF TAKEOFF. CREW REPORTED THAT WHEN THEY MOVED THE FLAP/SLAT HANDLE FROM POSITION 1 TO FULLY RETRACTED THAT A NOISE WAS HEARD. UPON CARRYING OUT A VISUAL INSPECTION, IT WAS OBSERVED THAT A PORTION APPROXIMATELY 800 SQUARE INCHES OF THE TRAILING UPPER EDGE OF #6 SLAT WAS MISSING. THE CAUSE IS NOT YET DETERMINED.