Abstract: An air inlet assembly for a gas turbine aircraft engine includes a fixed turning vane and a movable turning vane that is carried on the trailing edge of the air deflector door. To optimally direct and accelerate a flow of air into the engine intake, the low-pressure and high-pressure surfaces of the airfoil-shaped fixed turning vane lie in parallel planes at the trailing edge of the vane. The turning vane on the air deflector door has a low-pressure, convex surface that rests against the fixed turning vane when the door is deployed in the anti-icing mode. Under normal conditions, the door is stored and the two vanes cooperate to form an aerodynamic converging channel, which accelerates the flow and attaches it to the low-pressure surface of the vane on the door.