What was found
PVR FLT 349 EN-ROUTE PHX TO PVR. ON APPROACH, WITH FLAPS 1 SELECTED, THE NR 6 LEADING EDGE DEVICE DID NOT EXTEND. THE OVERHEAD PANEL AND FORWARD FLAP TRANSIT AMBER LIGHT ILLUMINATED. WHEN THE FLAPS WERE MOVED TO 15, MOVEMENT IN THE NR 6 LEADING EDGE DEVICE WAS NOTICED. THE FLIGHT DECLARED AN EMERGENCY AND LANDED WITH FLAPS AT 15. NO ROLL WAS NOTICED IN THE AIRCRAFT DURING FLAP EXTENSION. MAINTENANCE REMOVED AND REPLACED THE NR 6 SLAT PROXIMITY SWITCH TARGET.