Duncan Aviation's Provo, Utah, location has received an extension of its Authorized Service Facility (ASF) agreement with Bombardier Business Aircraft to include the Challenger 850. The Provo ASF approval authorizes the MRO to perform warranty services for Bombardier products including the Learjet 40, 45, 60, 70 and Learjet 75 as well as the Challenger 300, 600 and 850 series. The Provo location also provides authorized warranty services for line support and around-the-clock AOG services for Global Express and Global 5000.