What was found
LE FLAP ASYMMETRY MSG ILLUMINATED AT 100 FEET AIRBORNE ON TAKEOFF. FLAPS RET PER MAINT CORD. INSTRUCTIONS VISUAL INSP BY F/O REVEALED LE SLATS EXTENDED APROX 6 INCHES FROM UP. RETURNED JFK. FOUND NR 6 SLAT ACTUATOR ROD BROKEN IN HALF PREVENTING FULL RETRACTION. ROD CAUSED DAMAGE TO SLAT T/E WEDGE. REPLACED ACTUATOR AND FERRIED AIRCRAFT TO ATL FOR REPAIRS.