Deutsche Windtechnik and VentientEnergyare further expanding their cooperation in the area of wind turbine service: Over the next three years,Deutsche Windtechnik will continue to be responsible for the maintenance of the 61 Siemens turbines at the Causeymire and Farr wind farms in the Scottish Highlands operated by Ventient Energy. What is new is that the responsibility for the maintenance and repair of major components is now part of the contractual scope.