TROY GROVE – A Wisconsin couple was injured after a serious motorcycle crash on I-39 Thursday. The Illinois State Police say around 3:30 PM they were called to the northbound lanes of the interstate near Troy Grove for a single vehicle motorcycle crash. Authorities say 74-year-old Dennis C. Luebke was towing a trailer with a motorcycle when the rear tire of the bike became flat. The cycle then entered the median then overturned, ejecting Dennis and his passenger, 68-year-old Linda K. Luebke. Dennis was taken by Lifeflight helicopter from the scene and Linda was taken via ambulance to an area hospital. The current conditions of the Appleton couple were not available. The crash remains under investigation.