Complex sentence: On 13 December 2017, Dassault abandoned the Silvercrest due to technical and schedule risks, ended the 5X development and launched a new Falcon with the same cross section, Pratt & Whitney Canada engines and a range for a 2022 introduction.
Split into simpler sentences: On 13 December 2017, Dassault abandoned the Silvercrest due to technical and schedule risks, ending the 5X development. In its place the company launched a new Falcon model with the same fuselage cross section, Pratt & Whitney Canada engines and a range, planned for a 2022 introduction.