As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON APPROACH THE CREW RECEIVED A FLAPS FAIL MESSAGE AT 20 DEGREES. AN EMERGENCY WAS DECLARED AND WAS MET BY EMERGENCY EQUIPMENT ON LANDING BUT THEY WERE NOT NEEDED. THE AIRCRAFT TAXIED TO THE GATE ON THEIR OWN POWER. MAINTENANCE TROUBLESHOT AND REPLACED THE FLAP POSITION LEVER.