1. A device aboard an aircraft comprising output means ( 3 ) configured to restore information relating to the aircraft status from aircraft systems ( 7 a - 7 c ), and input means ( 17 ) configured to transmit control data to said aircraft systems ( 7 a - 7 c ), characterised in that it includes a module ( 5 , 5 a ) providing interface between the output ( 3 ) and input ( 17 ) means on the one hand, and said aircraft systems ( 7 a - 7 c ) on the other hand, said module ( 5 , 5 a ) being configured to synthesise the information from the aircraft systems depending on predetermined behaviour rules and to transmit said information thus synthesised to said output means, said module being further configured to provide transmission of the control data from the input means ( 17 ) to the aircraft systems which are the most suitable for carrying out these controls.