A sump auxiliary system for a gas turbine engine comprising: an air chamber comprising an inlet to receive pressurized air from a gas turbine engine ; an oil capture cavity positioned between the air chamber and an oil sump supplying lubricating oil to the gas turbine engine ; the oil capture cavity including an auxiliary vent formed in a base of the oil capture cavity ; a seal separating the oil capture cavity from fluid communication with the oil sump ; and a nozzle providing fluid communication between the oil capture cavity and the air chamber , the nozzle configured and positioned to direct a stream of the pressurized air into the oil capture cavity and against an opposite wall of the oil capture cavity , wherein the opposite wall and base are formed as part of an annular structure , the opposite wall extending inwardly away from the base toward a central axis of the gas turbine engine , a flange formed as a continuous extension of the opposite wall , the flange forming an inboard wall of the oil capture cavity that is closer to the central axis than an outboard wall of the oil capture cavity formed by the base , wherein the combination of the base , the opposite wall , and the flange define a quiescent zone ; and wherein the transition from the base to the opposite wall and from the opposite wall to the flange have a predetermined radius of curvature configured to create a circulating flow of air within the quiescent zone forming an air curtain created by the pressurized air to maintain the quiescent zone at the base of the oil capture cavity which results in cyclonic separation of particulate through vortex separation from the stream of pressurized air , the auxiliary vent being formed within the quiescent zone . an air chamber comprising an inlet to receive pressurized air from a gas turbine engine ; an oil capture cavity positioned between the air chamber and an oil sump supplying lubricating oil to the gas turbine engine ; the oil capture cavity including an auxiliary vent formed in a base of the oil capture cavity ; a seal separating the oil capture cavity from fluid communication with the oil sump ; and a nozzle providing fluid communication between the oil capture cavity and the air chamber , the nozzle configured and positioned to direct a stream of the pressurized air into the oil capture cavity and against an opposite wall of the oil capture cavity , wherein the opposite wall and base are formed as part of an annular structure , the opposite wall extending inwardly away from the base toward a central axis of the gas turbine engine , a flange formed as a continuous extension of the opposite wall , the flange forming an inboard wall of the oil capture cavity that is closer to the central axis than an outboard wall of the oil capture cavity formed by the base , wherein the combination of the base , the opposite wall , and the flange define a quiescent zone ; and wherein the transition from the base to the opposite wall and from the opposite wall to the flange have a predetermined radius of curvature configured to create a circulating flow of air within the quiescent zone forming an air curtain created by the pressurized air to maintain the quiescent zone at the base of the oil capture cavity which results in cyclonic separation of particulate through vortex separation from the stream of pressurized air , the auxiliary vent being formed within the quiescent zone . <EOS>