 In 2015, Safran passed €654 million of depreciation for amortization for the Silvercrest program.In November 2016, issues were traced to airflow through the engine not as controlled as expected, a side-effect of the axial-centrifugal high-pressure compressor selection, controlling software was adapted to maintain a steady airflow and active clearance controls were added to the low pressure turbine ; in May 2017, altitude tests should begin soon in Russia for an early 2018 certification.The Silvercrest 2D was to power the Dassault Falcon 5X and the 2C the Cessna Citation Hemisphere, EASA certification was expected in spring 2018 and FAA certification in August 2018.