As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED ON APPROACH TO CLT A FLAPS FAIL CAUTION MESSAGE AT 20°. FAILURE OCCURRED WHEN SELECTING FROM 20 TO 30. MAINTENANCE TROUBLESHOT THE FLAP SYSTEM USING THE FIM AND AIRCRAFT MAINTENANCE MANUAL. MAINTENANCE REMOVED AND REPLACED THE FECU. OPERATIONAL CHECKS WERE DONE PER THE AIRCRAFT MAINTENANCE MANUAL. AIRCRAFT WAS RELEASED FOR SERVICE.