Auxiliary oil system for negative gravity event

A lubrication system for a gas turbine engine comprising:

• a bearing compartment;
• a main reservoir fluidly connected to the bearing compartment by a main supply passage, which includes one or more passage segments therein;
• a main pump arranged in the main supply passage configured to draw fluid from the main reservoir and provide the fluid to the bearing compartment during a positive gravity condition;
• an auxiliary reservoir;
• an auxiliary pump fluidly connected between the auxiliary reservoir and the bearing compartment via an auxiliary passage;
• and
• a secondary supply passage fluidly connecting the main reservoir to at least one segment of the main supply passage, thereby providing fluid from the main reservoir to the bearing compartment during a negative gravity condition, wherein the main reservoir includes upper and lower portions, the main supply passage in fluid communication with the lower portion, and the secondary supply passage in fluid communication with the upper portion, wherein fluid from the main pump is configured to reach the bearing compartment before reaching the auxiliary reservoir.