As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING APPROACH THE FLAPS FAIL CAUTION MESSAGE ILLUMINATED WITH FLAPS AT 20 DEGREES SELECTED TO 30 DEGREES. THE CREW FOLLOWED THE QRH AND LANDED WITHOUT INCIDENT. MAINTENANCE REMOVED AND REPLACED THE FLAP ELECTRONIC CONTROL UNIT. THE FLAP SYSTEM OPERATIONALLY CHECKED GOOD. THE AIRCRAFT WAS RELEASED FOR SERVICE.