What was found
AT TAKEOFF AND INTO CRUISE FLIGHT, THE NR 2 ENGINE BEGAN OSCILLATING AND GOING TO HIGH SIDE. THE NR 2 ENGINE WAS BROUGHT BACK TO THE GROUND POSITION AND HELICOPTER WAS RETURNED TO THE SERVICE LANDING. TROUBLESHOOTING REVEALED CORROSION/ RESISTANCE IN THE NR 2 ENGINE, NR 2 DECK CANNON PLUG 103P17. THE NR 2 ENGINE N2 HARNESS WAS REPLACED, OPERATIONALLY CHECKED GOOD AND THE HELICOPTER RETURNED TO SERVICE.