As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED A SLAT FAIL MESSAGE AT 20° AFTER DEPARTURE FROM IND. AIRCRAFT RETURNED TO IND AND LANDED WITHOUT INCIDENT. MAINTENANCE TROUBLESHOT AND INSPECTED THE AIRCRAFT AND PERFORMED CHECKS USING THE AIRCRAFT MAINTENANCE MANUAL. RESULTS OF THE CHECKS WERE SATISFACTORY AND NO DEFECTS WERE NOTED. AIRCRAFT WAS RELEASED FOR SERVICE.