As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) AFTER TAKEOFF SLATS FAILED BETWEEN 0-1. FLIGHT RETURNED TO POINT OF DEPARTURE AND DECLARED AN EMERGENCY WITH ATC. FLIGHT LANDED WITH NO ISSUE BUT MET ON RWY BY EMERGENCY VEHICLES SFCC NR 1 AND NR 2 WTB RESET, SFCC NR 1 AND NR 2 TEST COMPLETED AND RESET. FLAPS/SLATS EXTENDED AND DEVICES INSPECTED. NO FAULTS FOUND. SUSPECT SLUSH CAUSING FAULT. OPS CHECKED NORMAL.