Patent ID: 8764604

Claim:
A turbine engine comprising: an input shaft and a fan shaft rotatable about an axis, the fan shaft supporting fan blades; an epicyclic gear train connected between the input shaft and the fan shaft, the epicyclic gear train including a plurality of star gears, a carrier supporting the plurality of star gears, a sun gear that meshes with the plurality of star gears and a ring gear surrounding and meshing with the plurality of star gears such that the sun gear is rotatable in a first direction and the ring gear is rotatable in a second, opposite direction, the ring gear including first and second portions that each have an inner periphery with teeth, the first and second portions including respective recesses facing one another to provide an internal annular cavity, the first and second portions of the ring gear each having an outer circumferential surface opposite the teeth and a respective flange projecting radially outwardly from the respective outer circumferential surface, the flanges including respective grooves therein; and a seal adjacent the flange, the seal including a slot configured to permit oil to pass through the seal to drain into a gutter outwards of the flange.