As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMB THE CREW RECEIVED A FLAP FAIL MESSAGE AND ELECTED TO RETURN TO IAH. THE AIRCRAFT LANDED AT IAH WHERE MAINTENANCE REMOVED AND REPLACED FLAP ELECTRONIC CONTROL UNIT. THE AIRCRAFT WAS OPERATIONALLY TESTED AND THE DISCREPANCY CLEARED.