What was found
THE RT MLG GREEN LIGHT DID NOT ILLUMINATE WHEN GEAR WAS EXTENDED FOR LANDING ON APPROACH. A MANUAL GEAR EXTENSION WAS PERFORMED, BUT THE LIGHT DID NOT COME ON. A TOWER FLY-BY WAS CONDUCTED AND THE GEAR WAS CONFIRMED DOWN AND LOCKED. THE AIRCRAFT LANDED WITHOUT INCIDENT. MAINTENANCE FOUND PIN 5 AT PLUG ON RT MLG DOWNLOCK SWITCH BROKEN. THE PLUG AND SWITCH WERE REPLACED AND OPERATIONAL CHECK WAS GOOD.