As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RECEIVED FLAP CONTROL FAULT ON TAXI WHEN FLAPS 15 IS SELECTED. COMPLIED WITH QRH PROCEDURES AND PROBLEMS STILL EXISTED. CLEANED CANNON PLUG ON OUTBOARD FLAP ACTUATOR. POWERED DOWN SYSTEM. REMOVED FCU. CHECKED CONNECTIONS, REINSTALLED FCU. OPERATED FLAP SYSTEMS THROUGH ALL MODES OF OPERATIONS. NO DEFECTS NOTED.