 In October 2017, after Safran discovered high-pressure compressor response problems at high altitudes and low airspeeds on its flying testbed in San Antonio, Dassault announced the Falcon 5X introduction could be further delayed after 50 test flight hours, and do not rule out switching its engine supplier.An axial-centrifugal high-pressure compressor is common below but rare for the range.Textron Aviation declared that they were confident that these problems will be solved when it powers the Citation Hemisphere.