Fuel cooler assembly

A fuel cooler assembly formed in accordance with the present disclosure includes an outer tank shell (112), an inner tank shell (110) disposed within the outer tank shell, and an access opening (124) defined in the inner tank shell at a first location on the fuel tank (100). A fuel return cavity (116) is defined between the inner and outer tanks shells, which is in fluid communication with the access opening. A fuel return opening is formed within the outer tank shell, which is in fluid communication with the fuel return cavity at a second location on the fuel tank.