Rolls-Royce T406

T406 / AE 1107
A T406 engine nacelle on a V-22
Type Turboshaft
National origin United States
Manufacturer Allison Engine Company
Rolls-Royce Holdings
First run late 1986
Major applications Bell Boeing V-22 Osprey
Number built 860 (2018)
Developed from Allison T56/T701
Developed into Rolls-Royce AE 2100
Rolls-Royce AE 3007

The Rolls-Royce T406 (company designation AE 1107) is a turboshaft engine developed by Allison Engine Company (now part of Rolls-Royce) that powers the Bell Boeing V-22 Osprey tiltrotor. The engine delivers 6,000 shp (4,470 kW).