Planetary gearbox having compliant journal bearings

A gas turbine engine comprising a compressor, a combustor and a turbine, the turbine having a first section for driving the compressor and a second section driving a load, the second section of the turbine operatively connected to a sun gear of a gear train, the sun gear meshed with main gears of a plurality of planet gear assemblies pivotally mounted on a planet carrier, the planet gear assemblies each having a fore lateral gear and an aft lateral gear of a diameter different than a main gear diameter, the fore and aft lateral gears disposed on opposite sides of the main gears, each of the plurality of planet gear assemblies being rotatably mounted on a bearing for rotation about an axis, at least one of the bearing including a journal and extending axially relative to the axis from a first axial end face to a second axial end face thereof, the journal bearing defining a first undercut extending from the first axial end face toward the second axial end face and a second undercut extending from the second axial end face toward the first axial end face, a fore ring gear meshed with the fore lateral gear, an aft ring gear meshed with the aft lateral gear, one of the fore and aft ring gears and the planet carrier driving the load by rotation, while rotation of another one of the ring gears and the planet carrier is limited.