The partnership within BELAIRBUS of SONACA, ASCO INDUSTRIES and EURAIR, each of which specialized in a specific technological field, is the key of success of BELAIRBUS. These three manufacturers collaborate by pooling their skills to provide AIRBUS INDUSTRIE, starting from the concept phase, with a functional whole: the slat-slat track system (the mobile wing leading edge system). During the past 28 years of collaboration, each of the three industrial partners of BELAIRBUS has acquired experience and very special skills in their respective industrial fields, obtained as the result of a major industrial investment and development. SONACA A world-class source for fixed and movable leading-edges EURAIR Specialized manufacturer of gears and transmissions for aeronautical activities ASCO INDUSTRIES A world leader in manufacturing hard metal, high precision mechanics