Patent ID: 8523114
Filing Date: 2013-09-03
Classification: B60K,B64D

Abstract:
1. An aircraft fuel tank system comprising: a vent tank comprising an inlet from one or more fuel tanks and a first and second ullage vent means within said vent tank, said vent tank being arranged to provide a predetermined maximum fuel capacity and having a minimal ullage at said maximum fuel capacity; sealing means arranged in a closed position to provide a fluid tight seal for said second ullage vent and operable between said closed position and an open position for enabling fluid flow between said vent tank and atmosphere via said second ullage vent; an external flame barrier means comprising a flame barrier element and vent means, said external flame barrier means being arranged for insertion through said second ullage vent into the ullage of said vent tank and slidable within a bore of said second ullage vent so as to provide a conduit for said fluid flow between said vent tank via said vent means and said flame barrier element to atmosphere; and said sealing means is arranged to be coupled to said external flame barrier.