What was found
LANDING GEAR WOULD NOT RETRACT. FOLLOWED QRH, DECLARED EMERGENCY, RETURNED TO FIELD, LANDED WITHOUT INCIDENT. R & R NOSE GEAR LT PROXIMITY SWITCH IAW 32-62-01. OPS CHECK GOOD. LAST SCHEDULED SERVICING WAS 9/25/2014, WITH AN UNSCHEDULED SERVICING ON 10/25/2014.