An electrical distribution system for the ignition system of an aircfraft engine and corresponding method

The device has a switch (205) to simulate a defect of an electrical supply (105) of primary and secondary supplies. A detection unit i.e. engine interface function (210), detects connection of an igniter on a hand to the switch, which is connected on another hand to another electrical supply (115). The switch includes a relay supplied by the former electrical supply, so that an igniter (110) to which the switch is connected is connected to the latter electrical supply in the event of defect of the former electrical supply. An independent claim is also included for a method for providing electrical distribution in an ignition system of an engine of an aircraft.