1. Department of Airframe and Powerplant Maintenance, School of Civil Aviation, Suleyman Demirel University, Isparta, Turkey
2. Department of Mechanical Engineering, Faculty of Mechanical Engineering, Yıldız Technical University, Besiktas, Istanbul, Turkey
3. Department of Airframe and Powerplant Maintenance, Faculty of Aeronautics and Astronautics, Anadolu University, Eskişehir, Turkey