What was found
PHX - AIR TURNBACK, AT ROTATION THE LEADING EDGE INTRANSIT LIGHT ILLUMINATED AND THEN EXTINGUISHED AS THE CLIMB WAS INITIATED AND ALL SLATS WERE IN EXTENDED POSITION. WHEN FLAPS WERE RETRACTED A LOUD SOUND WAS HEARD AND THE NR 1 SLAT WAS AT FULL EXTEND WITH OTHER SLATS/FLAPS RETRACTED; THE QRH ASYMMETRICAL L/E SLATS CHECKLIST WAS ACCOMPLISHED & AN UNEVENTFUL LANDING IN PHX WAS ACCOMPLISHED. MAINTENANCE FOUND NR 1 L/E SLAT ACTUATOR ROD END FAILED; IT WAS SPLIT ALLOWING ACTUATOR TO RETRACT BUT LEAVING SLAT EXTENDED. THE BEARING REMAINED ATTACHED TO SLAT; ACTUATOR WAS REMOVED AND SLAT AND WING LEADING EDGE INSPECTION WAS PERFORMED. SLAT ACTUATOR AND ROD END ASSY WERE REPLACED AND FUNCTIONAL CHECKS WERE GOOD.