Abstract: A tank wall connector system for use with a composite tank, the connector comprises a connector having a body extending from an interior of the tank to an exterior of the tank when installed through a hole in the composite tank. The connector has a first electrical conductivity property. An interface is positioned between the connector and a wall of the composite tank when installed to the tank thereby preventing physical contact between the connector and the tank wall in the interior of the tank, the interface having a second electrical conductivity property, different from the first electrical conductivity property.

Abstract: A drain for expelling fluids from an interior of an aircraft to an exterior of the aircraft, the drain including a drain tube disposed at the interior of the aircraft having a first end disposed in fluid communication with an aircraft equipment to be drained and an opposite second end, wherein the drain tube terminates at the second end at a location within the interior of the aircraft, a seal which extends between the second end of the drain tube and an outer skin of the aircraft, delimiting a drainage cavity, and a drainage pathway extending from the cavity through the outer skin to the exterior of the aircraft.

Abstract: A drain for expelling fluids from an interior of an aircraft to an exterior of the aircraft, the drain including a drain tube disposed at the interior of the aircraft having a first end disposed in fluid communication with an aircraft equipment to be drained and an opposite second end, wherein the drain tube terminates at the second end at a location within the interior of the aircraft, a seal which extends between the second end of the drain tube and an outer skin of the aircraft, delimiting a drainage cavity, and a drainage pathway extending from the cavity through the outer skin to the exterior of the aircraft.