As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON FLIGHT, WHEN CREW SLECTED GEAR DOWN FOR LANDING RT MAIN GEAR DOWN LIGHT DID NOT COME ON. GEAR WAS CYCLED SEVERAL TIMES WITH THE SAME RESULT. CREW THEN USED THE EMERGENCY EXTENSION PROCEDURE AND ALL 3 GREEN GEAR DOWN AND LOCKED LIGHTS CAME ON. CONNECTOR CORRODED.