Patent ID: 8096499

Claim:
A device for feeding combustion air to an engine disposed in an interior of an aircraft comprising: a primary air inlet duct extending between an exterior surface of the aircraft and the engine, wherein the air inlet duct extends from air inlets disposed in a first region of the exterior surface and provides combustion air to the engine; at least two further inlet ducts extending between a second and third region of the exterior surface and the engine, so as to provide a three-way combustion air supply, with each of the at least two further inlet ducts having an end inlet-cover filter element; wherein the second and third regions are on opposite longitudinal sides of the exterior surface, the longitudinal sides extending between fore and aft of the aircraft; and a control device configured to switch the combustion air supply to the engine from either or both of the at least two further inlet ducts when a blockage occurs in the primary air inlet duct.