Patent ID: 7415396

Claim:
A method for monitoring the validity of a parameter calculated by an anemometric unit of an aircraft having three engines, the method comprising: (a) determining a first datum based on the parameter calculated by the anemometric unit; (b) determining three second datums corresponding to the first datum, each of the second datums being determined from a measured value obtained from a separate probe associated with a separate one of the engines; (c) calculating, for each of the second datums, a difference between the second datum and the corresponding first datum; (d) comparing the absolute value of each of the calculated differences with a predetermined threshold value corresponding to the monitored parameter; and (e) determining from the comparisons for the monitored parameter: that the parameter is invalid if the absolute values of the three calculated differences are greater than the predetermined threshold value, and that the parameter is valid if the absolute values of the three calculated differences are not greater than the predetermined threshold value.