Assembly comprising a system for synchronizing at least two computing units of an aircraft, and also said at least two computing units, these two computing units (3, 4) being capable of implementing a plurality of identical partitions (P1A to PNA, P1B to PNB), each of said computing units (3, 4) comprising at least a scheduler (7A, 7B), an internal clock (9A, 9B) and a software platform (11A, 11B) comprising said plurality of partitions (P1A to PNA, P1B to PNB), the synchronizing system comprising: - an independent clock; - a generation unit configured to generate a synchronizing pulse, said generation unit being associated with the independent clock and comprising a pulse generator and a form generator for generating a calibrated synchronizing pulse on the basis of data from said clock, said synchronizing pulse being generated periodically, and a reception element configured to receive an item of availability information from each of said computing units (3, 4); - transmission links (22A, 22B) configured to transmit the synchronizing pulse to each of said computing units (3, 4); and - in each of said computing units (3, 4), a control element (23A, 23B) configured to compare the synchronizing pulse received by the computing unit (3, 4) with a pulse generated by the internal clock (9A, 9B) of this computing unit (3, 4), and to conclude therefrom that there is conformity if the synchronizing pulse and the pulse generated by the internal clock (9A, 9B) have the same temporal form and that there is a lack of conformity if the synchronizing pulse and the pulse generated by the internal clock (9A, 9B) have different temporal forms on the basis of this comparison, and in that the scheduler (7A, 7B) of each of said computing units (3, 4) is configured to trigger a sequence of implementing at least some of said partitions (P1A to PNA, P1B to PNB) upon receiving the synchronizing pulse, and to do so only when the control element (23A, 23B) of the corresponding computing unit (3, 4) concludes that there is conformity. the synchronizing system comprising: - an independent clock; - a generation unit configured to generate a synchronizing pulse, said generation unit being associated with the independent clock and comprising a pulse generator and a form generator for generating a calibrated synchronizing pulse on the basis of data from said clock, said synchronizing pulse being generated periodically, and a reception element configured to receive an item of availability information from each of said computing units (3, 4); - transmission links (22A, 22B) configured to transmit the synchronizing pulse to each of said computing units (3, 4); and - in each of said computing units (3, 4), a control element (23A, 23B) configured to compare the synchronizing pulse received by the computing unit (3, 4) with a pulse generated by the internal clock (9A, 9B) of this computing unit (3, 4), and to conclude therefrom that there is conformity if the synchronizing pulse and the pulse generated by the internal clock (9A, 9B) have the same temporal form and that there is a lack of conformity if the synchronizing pulse and the pulse generated by the internal clock (9A, 9B) have different temporal forms on the basis of this comparison, - an independent clock; - a generation unit configured to generate a synchronizing pulse, said generation unit being associated with the independent clock and comprising a pulse generator and a form generator for generating a calibrated synchronizing pulse on the basis of data from said clock, said synchronizing pulse being generated periodically, and a reception element configured to receive an item of availability information from each of said computing units (3, 4); - transmission links (22A, 22B) configured to transmit the synchronizing pulse to each of said computing units (3, 4); and - in each of said computing units (3, 4), a control element (23A, 23B) configured to compare the synchronizing pulse received by the computing unit (3, 4) with a pulse generated by the internal clock (9A, 9B) of this computing unit (3, 4), and to conclude therefrom that there is conformity if the synchronizing pulse and the pulse generated by the internal clock (9A, 9B) have the same temporal form and that there is a lack of conformity if the synchronizing pulse and the pulse generated by the internal clock (9A, 9B) have different temporal forms on the basis of this comparison, and in that the scheduler (7A, 7B) of each of said computing units (3, 4) is configured to trigger a sequence of implementing at least some of said partitions (P1A to PNA, P1B to PNB) upon receiving the synchronizing pulse, and to do so only when the control element (23A, 23B) of the corresponding computing unit (3, 4) concludes that there is conformity.