What was found
ON FINAL APPROACH WITH GEAR SELECTEDDOWN THERE WAS NO RT MAIN GREEN LIGHT INDICATION. THERE WAS NO AMBER DIWSAGREEMENT LIGHT. A GO-AROUND WAS INITIATED. WHEN FLAPS WERE SELECTED UP THE RT MAIN GEAR LIGHT CAME ON. A/C LANDED WITHOUT INCIDENT. INSPECTED A/C AND FOUND SAFE FOR FERRY FLIGHT FROM SCE TO DTW FOR RT MLG INDICATION. MAINTENANCE REPLACED MLG DOWNLOCK SWITCH (RT) IAW SAAB 340 AMM CHAP 32-61. ALL CHECKS GOOD.