Lubrication system with pump feed from de-aerator

An aircraft engine lubrication system for an aircraft engine having a first component (FC) with an FC inlet and an FC outlet, and a second component (SC) having an SC inlet and an SC outlet, the system comprising:

• a lubricant tank (LT) configured to contain a volume of lubricant, the lubricant tank having an LT outlet;
• a first pump (FP) having an FP inlet and an FP outlet;
• a second pump (SP) having an SP inlet and an SP outlet;
• a pressure regulating valve (PRV);
• a first de-aerator (FDA) having an FDA inlet, an FDA gas outlet, and an FDA liquid outlet;
• a second de-aerator (SDA) having an SDA inlet, an SDA gas outlet, and an SDA liquid outlet;
• wherein the LT outlet is in fluid communication with the FP inlet, the FP outlet is in fluid communication with the SP inlet, and the SP outlet is in fluid communication with the FC inlet and the SC inlet such that lubricant exiting the second pump passes to the first component and to the second component;
• wherein the PRV is disposed across the second pump and in fluid communication with the first pump;
• wherein the SC outlet is in fluid communication with the SDA inlet, and the SDA gas outlet and the SDA liquid outlet are in fluid communication with the lubricant tank, such that lubricant exiting the second component passes to the lubricant tank;
• wherein the FC outlet is in fluid communication with the FDA inlet, the FDA gas outlet is in fluid communication with the lubricant tank such that gas exiting the first de-aerator passes to the lubricant tank, and the FDA liquid outlet is in fluid communication with the first pump such that the lubricant exiting the first de-aerator passes to the first pump, bypassing the lubricant tank.