What was found
DURING A CLIMB, CRUISE SITUATION, THE NR 1 ENGINE N2 SYSTEM, BEGAN TO OSCILLATE TOWARDS THE HIGH SIDE. THE NR 1 ENGINE WAS BROUGHT BACK TO GROUND POSITION AND THE HELICOPTER WAS RETURNED TO THE SERVICE LANDING. TROUBLESHOOTING FOUND A FAULTY CANNON PLUG ATTACHED TO THE NR 1 N2 ACTUATOR. THE CANNON PLUG WAS REPLACED. OPERATIONALLY CHECKED GOOD AND THE HELICOPTER WAS RETURNED TO SERVICE.