As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ATL/MDW - FLT 59 - INBOARD FLAPS WOULD NOT RETRACT ABOVE 15 DEGREES. AIR TURN BACK TO ATL. ON SYSTEM OPS AND INSPECTION, FOUND FLAPS IN BYPASS MODE. RESET ASSYMETRY. FOUND LOOSE TORQUE TUBE COUPLING AT OUTBOARD FLAP POWER CONTROL UNIT. SECURED LOOSE TORQUE TUBE COUPLING, RETORQUED SCREWS. OPS CHECK OK PER 27-51-01. (X)