Patent ID: 8746611

Claim:
A lightning protection arrangement for an aircraft for protecting an electronic unit from lightning, which arrangement is capable, during a lightning strike, of diverting a lightning current onto an electrically conductive retaining structure of the fuselage of the aircraft, wherein the electronic unit is attached to an aerodynamic fairing outside the aircraft, the lightning protection arrangement comprising: a) an electrically conductive mounting plate which is arranged on an outer side of a CFRP sandwich panel of the aerodynamic fairing; b) an electrically conductive rear plate which is arranged on an inner side of the CFRP sandwich panel of the aerodynamic fairing and is connected in an electrically conductive manner to the mounting plate; c) a first electrically conductive and detachable attachment means which connects the electronic unit and the rear plate and further the mounting plate and the rear plate, a second electrically conductive and detachable attachment means which connects the rear plate electrically to the mounting plate and a third electrically conductive and detachable attachment means to connect the mounting plate to the electrically conductive retaining structure; wherein said first electrically conductive and detachable attachment means is provided to attach the electronic unit to a body, and by which an electrically conducting connection is realised between the electronic unit and the mounting and rear plates arranged on the CFRP sandwich panel, such that during a lightning strike, a low-resistance current path is provided for the lightning current from the electronic unit via the mounting plate and the rear plate, from which current path the lightning current is diverted onto the electrically conductive retaining structure of the lightning protection arrangement which is connected to the mounting plate via the third electrically conductive and detachable attachment means, wherein the electronic unit is arranged in the center of the mounting plate, an anticorrosive sealing layer being placed on the mounting plate and on which the mounting plate is positioned.