The AS 355 build by Eurocopter is a light twin-engine helicopter offering 5/7 seating and is powered by 2 turbo-shaft engines. The AS 355N version is fitted with two Turbomeca Arrius 1A engines and a Full Authority Digital Engine Control system for better M.T.O.W and better single engine performance, tail rotor strake added along starboard side of the tail boom for better yaw authority.