As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON DEPARTURE THE FLAPS & SLATS WOULD NOT RETRACT. CREW DIVERTED & LANDING WAS UNEVENTFUL. COMPLETED FUNCTIONAL CHECKS OF THE FLAPS & SLATS. FOUND LT NR 3 FLAP ACTUATOR INTERNAL POSITION POTENTIOMETER ERRATIC. REPLACED FLAP ACTUATOR. OPERATIONS CHECKED GOOD.