Patent ID: 8978356
Filing Date: 2015-03-17
Classification: F02K,F15B,Y02T

Abstract:
1. An actuation system for a gas turbine engine including a thrust reverser and a variable area fan nozzle, the system comprising: a plurality of linear actuators, each linear actuator comprising a first outer piston concentric with a second inner piston, wherein the first outer piston is operatively connected to a thrust reverser and the second inner piston is operatively connected to a variable area fan nozzle; a piston lock assembly for selectively locking the first outer piston to the second inner piston, the piston lock assembly comprising a solenoid coupled to an extendable and retractable pin, the extendable and retractable pin configured for insertion into two corresponding first outer piston slots formed in opposite sides and at a same axial location on the first outer piston, and configured for insertion into one of two corresponding second inner piston slots formed at different axial locations along the second inner piston, the second inner piston slots being configured to allow the variable area fan nozzle to be locked in a stowed position or a deployed position, respectively, and being further configured to allow the extendable and retractable pin to be moved into and out of the first outer piston slots and one of the two second inner piston slots with an axial movement of the first outer piston and the second inner piston; and, a control system coupled to the plurality of linear actuators for operating the variable area fan nozzle between the stowed position and the deployed position.