The cockpit panel is equipped of light (switch light, indicating light,?) which must be harmonized. The Lighting Ancillary Unit (LAU) which manage the electrical power of the cockpit light are equipped
of 31 potentiomenters to ajust each output voltages. The two LAU are located in the nose avionic
bay.So to perform the cockpit light harmonizing maintenance task a Ground Support Equipment is
required to put the LAU inside the cockpit with potentiometers accessibilities.