As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BNA - FLT - 4569 - ON APPROACH, WHEN GEAR WAS EXTENDED WITH NO NOSE GEAR GREEN LIGHT INDICATION AND NO TAXI LIGHT. ACFT RETURNED TO BNA AND LANDED WITHOUT INCIDENT. PURGE WATER OUT OF DOWNLOCK ACTUATOR BY SERVICING ACTUATOR WITH GREASE. ALSO, CLEANED DOWNLOCK SWITCH AS PRECAUTIONARY MEASURES.