System and method for supplying lubrication fluid to at least one member of aircraft propulsion assembly

The invention relates to a system (1, 100, 110) for supplying lubricating oil to members of a turbine engine having one reducer. The power supply system (1, 100) includes: a kinetic pumping device (2)to be connected upstream to an oil tank (3) and rotated at a decorrelated speed of an operation mode of the turbine engine, a separation node (7) connected to the outlet of the kinetic pumping device(2), a first delivery arm (5) intended for lubricating an RGB (9) and connected to the kinetic pumping device (2) via the separation node (7), and a second delivery arm (6) intended for lubricating other members and connected to the kinetic pumping device (2) via the separation node (7). The second delivery arm (6) comprises a positive-displacement pump (11), and at least one fluid-metering system (8) that has a metering slot, is supplied with power by the kinetic pumping device (2) via the separation node (7), and is intended for supplying power to the RGB (9). 种用于将润滑油供给到具有个减速齿轮箱的涡轮发动机的构件的供给系统(1，100，110)，该供给系统(1，100)