U.S. Army Probes Chinook Power Losses

U.S. Army officials are assessing the cause of engine “rollbacks,” or power losses, on the latest-generation Chinooks. Losses of power from the Honeywell T55 engines have occurred both in flight and on the ground. Most incidents involve new Boeing MH-47Gs operated by the 160th Special Operations Aviation Regiment (Airborne). But one occurred last week on a new CH-47F with the 101st Airborne Div. Boeing and Honeywell are debating whether the problem originates with the airframe or the powerplant. Attention is focusing on the digital electronic engine controller on the T55. The service or manufacturers have yet to launch a formal engineering investigation of the anomalies. For related news