As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHEN SELECTING "GEAR DOWN" ON APPROACH TO DESTINATION AIRPORT THERE WAS NO RT DOWNLOCK "GREEN" ANNUNCIATOR. LANDING GEAR WAS CYCLED 5 TIMES. THE 5TH TIME SHOWED "3 GREEN" AND ACFT WAS LANDED WITHOUT INCIDENT. ACFT WAS JACKED AND GEAR WAS SWUNG. FOUND INTERMITTENT RT MAIN GEAR DOWN LOCK SWITCH. WIRING WAS BROKEN INTERNALLY RT AT THE SWITCH POTTING. REPLACED SWITCH WITH NEW PART. OPS CHECK SATISFACTORY AND ACFT RELEASED FOR SERVICE.