What was found
WHILE APPROACHING, CREW EXTENDED THE LANDING GEAR AND DID NOT GET ANY GEAR DOWN INDICATIONS. THEY BLEW THEIR GEAR DOWN WITH THE USE OF THE EMERGENCY CHECK LIST. STILL DID NOT GET ANY DOWN INDICATIONS. CREW DECLARED AN EMERGENCY AND CONTINUED THEIR APPROACH AND LANDED WITHOUT INCIDENT. MX FOUND THE EMERGENCY BATTERY PACK POWER OUT FUSE BLOWN. REPLACED EMERGENCY BATTERY PACK FUSE. LANDING GEAR NOW INDICATES SATISFACTORY, AC RETURNED TO SERVICE.