What was found
FLIGHT 8659 ANC, AIR TURN BACK DISCREPANCY. AFTER DEPARTURE, THE NOSE GEAR UNLOCK LIGHT REMAINED ILLUMINATED. THE CREW WENT THRU THE GEAR INDICATION ABNORMAL CHECKLIST WITH NO CHANGE. CREW DECIDED TO RETURN TO ANCHORAGE, NO EMERGENCY WAS DECLARED. ACFT LANDED WITHOUT INCIDENT. REPLACED THE NOSE GEAR ACTUATOR. OPERATIONS CHECKED GOOD & ACFT RETURNED TO SERVICE.