As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ATL/IAH AIR TURNBACK DUE TO LEFT WHEEL WELL DOOR PANEL FELL OFF DURING TAKEOFF ROLL. REMOVED AND REPLACED LANDING GEAR SELECTOR VALVE & RETRACT CYLINDER. REPLACED LEFT MAIN OUTER DOOR. OPERATION CHECK & GEAR SWING CHECK ALL NORMAL PER MM PROCEDURES.