21 May, 2019 SOURCE: FlightGlobal.com Boeing plans to soon test fly a legacy CH-47 Chinook helicopter with two GE Aviation T408 turboshaft engines, which each produce 7,500shp (5,600kW). The GE T408 turboshaft has 2,500shp more than the helicopter’s current engine, the Honeywell T55. It is certificated and installed on the US Marine Corps’ (USMC) forthcoming heavy lift helicopter, the Sikorsky CH-53K King Stallion. Boeing declines to say what Chinook model serves as a test