What was found
FLAPS AT APPROACH POSITION. SELECTED LANDING GEAR DOWN. POSITION INDICATORS SHOWED GREEN FOR NOSE AND LEFT MAIN GEAR. NO INDICATION ON RIGHT MAIN GEAR. CHECKED ANNUNCIATOR, GOOD. SELECTED FLAPS FULL DOWN AND RECEIVED CONFIGURATION WARNING HORN. DECLARED EMERGENCY WITH APPROACH. FOLLOWED ABNORMAL PROCEDURES CHECKLIST. OBTAINED DOWN AND LOCKED INDICATION AFTER MANUALLY PUMPING DOWN THE GEAR. CONDUCTED TOWER FLY BY TO VERIFY. VERIFIED THAT CONFIGURATION WARNING HORN DID NOT OCCUR WITH FULL FLAPS SELECTED. CONDUCTED UNEVENTFUL LANDING. AIRCRAFT TOWED TO HANGAR AND PLACED ON JACKS. DUPLICATED DISCREPANCY. INSPECTED RT DOWNLOCK SWITCH AND WIRING. FOUND S506 CONNECTOR LOOSE. SECURED CONNECTOR. OPERATION FOUND GOOD ON SEVERAL GEAR RETRACTION CYCLES.