As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED ON APPROACH THE LT MAIN GEAR DOWN LIGHT DID NOT ILLUMINATE. THE LIGHT ILLUMINATED DURING THE TEST. EMERGENCY PROCEDURES WERE FOLLOWED AND THE AC LANDED NORMALLY. THE DOWNLOCK SWITCH WAS REPLACED AND THE AIRCRAFT WAS RETURNED TO SERVICE.