Abstract: An actuator comprises a shaft 12 arranged to be driven for rotation by an electrically powered motor 18, a sleeve 22 encircling at least part of the shaft 12 and carrying a toothed rack formation 26, and a low friction screw coupling 36 between the shaft 12 and the sleeve 22 and arranged such that rotation of the shaft 12 drives the sleeve 22 for axial movement, wherein the low friction screw coupling 36 is adjacent and aligned with the rack formation 26.

Abstract: A variable area fan nozzle assembly for a turbofan engine includes a nacelle having an aft edge and a translating thrust reverser sleeve with a trailing edge. The thrust reverser sleeve is movably disposed aft of the nacelle's aft edge and is movable between a forward position and an aft position. A translating fan nozzle having a forward edge is movably disposed behind the trailing edge, and is movable between a stowed position and a deployed position. An upstream bypass flow exit is defined between the trailing edge and the forward edge when the fan nozzle is in the deployed position. An extendable actuation system is configured to move the fan nozzle between the stowed position and the deployed position.