Fire extinguishing system for an aircraft

The invention relates to a system for extinguishing and preventing a fire on board of an aircraft. According to the invention, an aircraft is equipped with an On-Board-Inert Gas Generating-System (OBIGGS) unit comprising a device with an OBIGGS inflow port connected to a source of gas mixture, said gas mixture comprising an inert gas component and an outflow port, said OBIGGS unit being adapted to separate said inert gas component out of said source of gas mixture and to provide said inert gas component to said outflow port, a first connector in fluid connection with said outflow port, a first gas conduit connecting said first connector to said fuel tank for providing said inert gas component to a fuel tank, a second connector in fluid connection with said outflow port and a second gas conduit connecting said second connector to at least one target space selected from the cockpit space, the passenger cabin space, the cargo bay