As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON APPROACH WITH FLAPS AT 20 DEGREES, THE FLAPS FAIL CAUTION MESSAGE ILLUMINATED WHEN SELECTING FLAPS 30 DEGREES. THE CREW FOLLOWED THE QRH AND LANDED SAFELY. MAINTENANCE RESET AND OPERATIONALLY CHECKED THE FLAP SYSTEM IAW CRJ200 AMM 27-54-00-710-801. OPS CHECKS WERE GOOD. THE AIRCRAFT WAS RELEASED FOR SERVICE.