As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED FLAPS FAIL AT 20 DEGREES WHEN FLAPS WERE SELECTED TO 30 DEGREES WHILE ON APPROACH TO CLT. AIRCRAFT LANDED IN CLT WITHOUT INCIDENT. MAINTENANCE TROUBLESHOT FLAP SYSTEM, REMOVED AND REPLACED FECU (FLAP ELECTRONIC CONTROL UNIT) AND PERFORMED CHECKS USING AIRCRAFT MAINTENANCE MANUALS. AIRCRAFT RELEASED FOR SERVICE.