The Shanghai Y-10 is a quad-engined single-aisle jet designed and developed by the Shanghai Aircraft Research Institute in the 1970s. Based on the Boeing 707-320C design, the aircraft used Pratt & Whitney JT3D turbofan engines acquired as spares for the Civil Aviation Administration of China (CAAC). In recent years, much information has been discussed about Chinese aviation and the development of new aircraft, especially the COMAC C919.