Abstract: Detection of the failure of a pressure sensor of an air data system of an aircraft having at least two pressure sensors includes measuring first and second pressure values with the aid of the two pressure sensors, respectively. The deviation between the first and second pressure values is calculated, and this deviation is compared with a predetermined threshold value. If the deviation is greater than the threshold value, a failure cue relating to the air data system is displayed on a display device that is mounted in the aircraft.

Abstract: Process and device for detecting the failure of a pressure sensor of an air data system of an aircraft.

Abstract: The relocking device comprises a polyphase clock signal generator for producing n clock signals which are equally displaced in phase with respect to each other including the reference clock signal, and rephasing circuits each assigned to one data train to be relocked and each having the function of selecting that version of the clock signal which is most effectively locked with respect to the data train to be processed by means of a double-sampling circuit and a clock-signal selecting circuit addressed by a sequential scanning circuit controlled by a comparator. The rephasing circuits utilize said version for sampling precise values of the data contained in the data train concerned and regenerate said data train by resampling these values in synchronism with the reference clock signal.