As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DEN - WHEN FLAPS SELECTED TO 20 DEGREES RECEIVED A SLAT FAIL CAUTION MESSAGE. PER THE CHECKLIST, SELECTED THE PREVIOUS FLAP SETTING AND OPERATION WAS NORMAL. MAINTENANCE INSPECTED AIRCRAFT AND FOUND NO FAULT OR MESSAGES IN THE MDC. CYCLED SLATS SEVERAL TIMES WITH NO DEFECTS. AIRCRAFT RETURNED TO SERVICE. NO PARTS REPLACED.