Viking Air employees are on the job again after a three-month layoff that saw the company sell several new Twin Otters and move forward on future deals. “There are a number of deals that are coming through that gave us enough confidence to restart the production line, so it’s fantastic,” Viking president Dave Curtis said Wednesday from Ottawa where he was attending the Canadian Aerospace Summit. …Viking is also diversifying by lining up 11 orders to convert CL-215 water bombers into a configuration similar to a newer version of the firefighting plane called the CL-415, or SuperScooper. ..In Europe, the CL-415 is recognized as the primary firefighting airplane, Curtis said. Different types of aircraft have their own roles to play in fighting fires, Curtis said. Planes are typically used to dump retardant on the edges of fires.