QAR/FDM and inaccurate data.
Consider this -
A pilot receives a call from his FDM department because he has exceeded a speed parameter such as tyre speed by 5kt.. The source of the data is IRS 1 providing ground speed ,but the IRS has been aligned at the time of the incident for 12 hours and has built up some errors so that it is overstating the perceived ground speed. and has caused the erroneous trigger. How would a pilot prove that he has been incorrectly caught by the system?