What was found
ON FLIGHT 4735, ON TAKEOFF, THE LANDING GEAR WAS SLOW TO RETRACT. THE CREW CYCLED, NOSE WHEEL RETRACTED, BOTH MAINS REMAINED DOWN WITH GREEN INDICATIONS UNSAFE. THE ACFT WAS REMOVED FROM SERVICE. R & R THE LT MLG ACTUATOR IAW JIC 32-31-50. THE OPS CHECK WAS GOOD. THE ACFT WAS RETURNED TO SERVICE.