What was found
FLT 4002 - WHEN SELECTING 'GEAR DOWN' IN PREPARATION FOR LANDING, CREW WAS UNABLE TO OBTAIN A SAFE NOSE LANDING GEAR INDICATION. AN EMERGENCY WAS DECLARED. EMERGENCY EQUIPMENT ON STANDBY, AIRCRAFT LANDED WITHOUT FURTHER INCIDENT. PIT MAINTENANCE REPLACED NOSE LANDING GEAR DOWNLOCK MICROSWITCH IAW MM 32-50-00. CONDUCTED LANDING GEAR SWING, OPS CHECK GOOD. AIRCRAFT RETURNED TO SERVICE.