Two-channel architecture with redundant links CCRF

The present invention relates to a flight control system of an aircraft comprising: a first processing unit 1, -a second processing unit 2, -the communication means configured to establish a first two-way digital link 3 and a second link bidirectional digital 4 between the first processing unit 1 and the second processing unit 2, said second link 4 being redundant with the first link 3, and said first 3 and second links 4 are likely to be active concurrently.