Originally Posted by
Pozidrive
This wouldn't help if the failure was beyond the servo, i.e. the shaft to the tail rotor. There is also the down side of adding weight and complexity.
A) Maybe not but what is the point of that statement?
B) The size and weight of such a mechanism (they do exist!) are very small, possibly adding not much more than couple of kilos, if as much as that. All we're talking about here is a device to spring bias the hydraulic servo control valve to a central position, i.e. to replicate the pilot's normal pedal input.
Can I suggest you read the following publication? Section 3 is of relevance to this accident:
https://publicapps.caa.co.uk/docs/33/CAPAP2003_01.PDF