What was found
PHX - DURING APPROACH, AS FLAPS WERE SELECTED FROM FLAPS 1 TO 5, CREW RECEIVED A LEADING EDGE FLAPS TRANSIT LIGHT ALONG WITH THE NR 2 SLAT. CREW EXECUTED A MISSED APPROACH AND ACCOMPLISHED A GO-AROUND. PRIOR TO LANDING WITH FLAPS AT 15, THE LEADING EDGE FLAPS RESET AND THE TRANSIT LIGHT WENT TO GREEN. FLIGHT LANDED WITH FLAPS 30, WERE RETRACTED TO UP POSITION AND TAXIED TO THE GATE WITH NO FURTHER PROBLEMS. ALL INDICATIONS WERE NORMAL. MAINTENANCE CYCLED FLAPS AND SLATS. INDICATION OPERATIONALLY CHECKS NORMAL. AIRCRAFT OK FOR SERVICE.