As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: ON TAKEOFF AFTER V1 CONFIGURE WARNING LASTED APPROXIMATELY 4 SECONDS, FOLLOWED BY AMBER LEADING EDGE FLAPS TRANSIT LIGHT. ON CLIMB FLAPS WOULD NOT RETRACT PAST 15 DEGREE. DECLARED EMERGENCY, LANDED, AIRCRAFT WAS APPROXIMATELY 600 POUNDS OVERWEIGHT. NORMAL SOFT LANDING 200-300 FEET PER MINUTE. REPLACED FLAP/SLAT ELECTRONICS UNIT.