What was found
AFTER TAKEOFF, LANDING GEAR WAS RETRACTED AND RIGHT GEAR UNSAFE LIGHT REMAINED ON. GEAR WAS RECYCLED, LIGHT STAYED ON. UPLATCH CHECK WAS ACCOMPLISHED, GEAR UNSAFE LIGHT WENT OUT. REPLACED RIGHT MAIN GEAR DOWN LOCK SWITCH PER DC-9 SUPP MM 32-60-01, OPS CHECK GOOD.