A turbofan engine comprising: a turbine engine; a nacelle surrounding at least a portion of the turbine engine and defining an annular bypass duct between the nacelle and the turbine engine and extending through the turbofan engine to define a generally forward-to-aft bypass air flow path; a thrust reverser having at least one movable control surface, movable to and from a reversing position, where at least a portion of the bypass air flow is at least partially reversed; a thrust reverser actuation system having at least one actuator operably coupled to the at least one moveable control surface to move the at least one moveable control surface into and out of the reversing position; and a guide comprising a rail and a bogie having three rotatable bearing surfaces (124a, 124b, 124c) coupled to the rail for relative translational movement between the rail and bogie; wherein one of the rail and bogie is mounted to the turbine engine and the other of the rail and bogie is mounted to the movable control surface such that operation of the at least one actuator moves the movable control surface by translation movement between the rail and the bogie; the rail comprises a guiding portion comprising three planar surfaces each lying on a distinct intersecting plane wherein all three distinct intersecting planes are perpendicular to a common cross section plane; the three rotatable bearing surfaces (124a, 124b, 124c) are in contact with the three planar surfaces of the guiding portion; the three rotatable bearing surfaces (124a, 124b, 124c) are arranged to provide opposing bearing forces to the rail; and the three rotatable bearing surfaces (124a, 124b, 124c) are arranged about the rail to prevent the separation of the rail and bogie. a turbine engine; a nacelle surrounding at least a portion of the turbine engine and defining an annular bypass duct between the nacelle and the turbine engine and extending through the turbofan engine to define a generally forward-to-aft bypass air flow path; a thrust reverser having at least one movable control surface, movable to and from a reversing position, where at least a portion of the bypass air flow is at least partially reversed; a thrust reverser actuation system having at least one actuator operably coupled to the at least one moveable control surface to move the at least one moveable control surface into and out of the reversing position; and a guide comprising a rail and a bogie having three rotatable bearing surfaces (124a, 124b, 124c) coupled to the rail for relative translational movement between the rail and bogie; wherein one of the rail and bogie is mounted to the turbine engine and the other of the rail and bogie is mounted to the movable control surface such that operation of the at least one actuator moves the movable control surface by translation movement between the rail and the bogie; the rail comprises a guiding portion comprising three planar surfaces each lying on a distinct intersecting plane wherein all three distinct intersecting planes are perpendicular to a common cross section plane; the three rotatable bearing surfaces (124a, 124b, 124c) are in contact with the three planar surfaces of the guiding portion; the three rotatable bearing surfaces (124a, 124b, 124c) are arranged to provide opposing bearing forces to the rail; and the three rotatable bearing surfaces (124a, 124b, 124c) are arranged about the rail to prevent the separation of the rail and bogie.