As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED ON ARRIVAL INTO CLT DUE TO THE SLATS LOCKED AT 0 ON DESCENT AND A SLATS FAULT MESSAGE. THE AIRCRAFT LANDED SAFELY AT CLT WITH FLAPS 3 AND NO SLATS. MAINTENANCE FOUND THE RIGHT WING #7 SLAT TRACK ACTUATOR TRIPPED AND REPLACED IT PER AMM 27-84-49. A SATISFACTORY OPERATIONAL CHECK WAS ACCOMPLISHED.