As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING APPROACH INTO BNA, NOSE LANDING GEAR GREEN LIGHT DID NOT ILLUMINATE AFTER GEAR EXTENSION. CREW DECLARED AN EMERGENCY AND VERIFIED VISUALLY THROUGH PERISCOPE THAT GEAR WAS DOWN AND LOCKED. AIRCRAFT LANDED WITHOUT INCIDENT. MAINTENANCE REPLACED NOSE GEAR LOCK SWITCH AND CONNECTOR. OPERATIONAL CHECK NORMAL. AIRCRAFT RETURNED TO SERVICE.