What was found
LEFT TAXIWAY TURNOFF SWITCH STARTED SMOKING WHEN TURNED ON WITH BURNING SMELL RUNWAY TURNOFF SWITCH TESTED WRT AMM 33-42-00 AND VISIBLE SMOKE COMES OUT OF IT, INSPECTED SWITCH AND VISIBLE SIGNS OF BURNOUT (INTERNAL FAULT) NOTED NEAR CONNECTORS, REMOVED AND INSTALLED A NEW SWITCH00-0364-3-0368 AND TESTED WRT AMM 33-42-00 FOR SEVERAL MINS AND NO FAULTS NOTED. ALSO INSPECTED WIRING FROM SW TO CB AN D CB TO THE TRANSFORMER WRT WDM 33-42-21 FOR SIGNS OF OVERHEATH, BAD/LOOSE CONNECTION AND NO OTHER FAULTS FOUND.