Virtual Reality learning environments offer special potential for training of complex skills and teaching complex content in a professional context. In such learning environments, authentic work tasks can be implemented, on the basis of which application-oriented competencies can be learned. In the VR learning environment MARLA, troubleshooting in the field of metal and electrical engineering is trained. Therefore students are taught a process containing eight steps facilitating a systematic approach in finding and fixing bugs in a complex system. By using an offshore wind turbine a concrete and authentic setting has been chosen to address the systematic troubleshooting process.