Time History
The time-history included in the report raises a few questions.
A 40 degree heading change at the end, yet the pedal position isn't on the trace.
The derived radio altitude rate does not square with the rate one derives by taking the slope of the proportional traces of baro and radio altitude at the end. Radio altititude rate signals have been suspect in other applications.
VRS, at least in the SA models I've been exposed to, typically results in a significant increase in cockpit N/rev excitation. Would be good to see the accelerometer traces along the same timeline as the Figure 1 data. On the same plot, would be ideal.
Seems a rush to judgement and perhaps a too convenient action to just hang it all on VRS, at least based on that one Figure as presented.
Would be helpful to see the AFCS/Autopilot commands and actuator out puts along the same time base.