Thanks for your info, very interesting.
In the light of your comments, would it then follow that the retrofit that is being applied to (some ?) 737s is an engineering enhancement which was (in his opinion) introduced to demonstrate that the (alleged) problem was actually being addressed by Boeing and being treated seriously (a techincal
PR action to reassure people like me)?
Did anyone ever find undisputable technical evidence of an uncommanded rudder action, or was this just a 'sensible' engineering conclusion based on the available facts?