A fuel system for an aircraft engine comprising: a fuel storage container; a fuel gathering system in fluid communication with the fuel storage container; and a fluid pump assembly in fluid communication with the fuel gathering system, the fluid pump assembly comprising: a main gear pump stage including a main driven gear meshed with a main drive gear in a main pump conduit to define a plurality of gear mesh pockets, and a main pump bearing assembly rotatably supporting the main drive gear and the main driven gear; a first flow attenuator disposed around the main pump conduit, the first flow attenuator including a substantially polygonal fluid opening having edges substantially aligned with an undercut bearing portion (104A, 104B, 106A, 106B) on an inlet side and an outlet side of the main pump conduit to define a non-round fluid boundary, characterized in that the substantially polygonal fluid opening has four substantially right angled walls and wherein the intersections of adjacent walls form rounded corners, wherein the non-round fluid boundary and the undercut bearing portion (104A, 104B, 106A, 106B) define a flow path through the main pump conduit, wherein some of the flow toward the inlet side of the main flow attenuator expands outwardly to the edges of the substantially polygonal fluid opening to counteract pulses from gear pocket flows converging from either side, and some of incoming fluid, by way of the undercut bearing portions (104A, 104B, 106A, 106B), is free to travel over or under the gear mesh pockets. a fuel storage container; a fuel gathering system in fluid communication with the fuel storage container; and a fluid pump assembly in fluid communication with the fuel gathering system, the fluid pump assembly comprising: a main gear pump stage including a main driven gear meshed with a main drive gear in a main pump conduit to define a plurality of gear mesh pockets, and a main pump bearing assembly rotatably supporting the main drive gear and the main driven gear; a first flow attenuator disposed around the main pump conduit, the first flow attenuator including a substantially polygonal fluid opening having edges substantially aligned with an undercut bearing portion (104A, 104B, 106A, 106B) on an inlet side and an outlet side of the main pump conduit to define a non-round fluid boundary, characterized in that the substantially polygonal fluid opening has four substantially right angled walls and wherein the intersections of adjacent walls form rounded corners, wherein the non-round fluid boundary and the undercut bearing portion (104A, 104B, 106A, 106B) define a flow path through the main pump conduit, wherein some of the flow toward the inlet side of the main flow attenuator expands outwardly to the edges of the substantially polygonal fluid opening to counteract pulses from gear pocket flows converging from either side, and some of incoming fluid, by way of the undercut bearing portions (104A, 104B, 106A, 106B), is free to travel over or under the gear mesh pockets. a main gear pump stage including a main driven gear meshed with a main drive gear in a main pump conduit to define a plurality of gear mesh pockets, and a main pump bearing assembly rotatably supporting the main drive gear and the main driven gear; a first flow attenuator disposed around the main pump conduit, the first flow attenuator including a substantially polygonal fluid opening having edges substantially aligned with an undercut bearing portion (104A, 104B, 106A, 106B) on an inlet side and an outlet side of the main pump conduit to define a non-round fluid boundary, characterized in that the substantially polygonal fluid opening has four substantially right angled walls and wherein the intersections of adjacent walls form rounded corners, wherein the non-round fluid boundary and the undercut bearing portion (104A, 104B, 106A, 106B) define a flow path through the main pump conduit, wherein some of the flow toward the inlet side of the main flow attenuator expands outwardly to the edges of the substantially polygonal fluid opening to counteract pulses from gear pocket flows converging from either side, and some of incoming fluid, by way of the undercut bearing portions (104A, 104B, 106A, 106B), is free to travel over or under the gear mesh pockets.