What was found
NCHEDULED ARRIVAL FROM PHX-MCI, ON LANDING, WHEN GEAR WAS SELECTED DOWN. THREE GREEN AND THREE RED LIGHTS WHERE BOTH BEING DISPLAYED AT THE SAME TIME. THE SECONDARY MAIN GEAR POSITION LIGHTS INDICATED LEFT DOWN AND LOCKED RIGHT NOT DOWN AND LOCKED. THE CREW THEN CYCLED THE GEAR AND NOTICED THREE GREEN LIGHTS ONLY. THE SECONDARY MAIN GEAR INDCIATED AGAIN LEFT DOWN AND LOCK. RIGHT NOT DOWN AND LOCKED. THE CREW THEN DECLARED AN EMERGENCY LANDING INTO MCI AND MADE A SAFE AND UNEVENTFUL LANDING. REMOVED AND REPLACED LANDING GEAR ACCESSORY UNIT. GROUND CHECKED NORMAL. THE AIRCRAFT WAS THEN RETURNED TO SERVICE. (M)