As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT RETURNED TO ATL AFTER T/O. FLT 5558 DEL 122 MINS. FLAP ELECTRONIC CONTROL UNIT FECU CHANNELS, A/C WITH SKEW DETECTION SYSTEMS FLAP POWER DRIVE UNIT MOTORS. REMOVED AND REPLACED RT MOTOR AND BRAKE ASSY IAW AMM 27-52-05. OPS CHECK GOOD IAW AMM 27-64-00. DEFER CLEARED PLACARD REMOVED.