What was found
CLT/SDF - FLT 2321 - AFTER TAKEOFF WHEN LANDING GEAR WAS RETRACTED, RLG DOWNLOCK SWITCH WARNING DISPLAYED ON MULTIFUNCTION DISPLAY UNIT. CAPTAIN RECYCLED THE LANDING GEAR. THE MESSAGE REMAINED ON THROUGHOUT THE FLIGHT. IT WAS NOTED THAT THE MESSAGE DISAPPEARS WHEN THE GEAR IS DOWN AND LOCKED. NO SPECIAL PRECAUTIONS WERE TAKEN. FLIGHT LANDED WITHOUT FURTHER INCIDENT. MAINTENANCE REPLACED AND ADJUSTED RIGHT LANDING GEAR PRIMARY DOWNLOCK SWITCH. PERFORMED GEAR SWING. ALL OPERATIONS WERE NORMAL. (X)