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Avionics, the electronic component of equipment used in aeronautics, has since 2000 faced an innovation problem related to rapid technological change as well as an increase in embedded functions. These considerations impact the competitive environment, opening the door to new, more specialized firms. A study of the technological trajectories of key players in avionics through patent analysis reveals that these players have less influence on electronic innovations, which are mostly driven by consumer electronics. Moreover, we detect intensive and implicit knowledge flows between avionics players, consisting of internal practices and expertise expected in the aeronautics sector.