I'm also bothered by the "Eurocopter has no idea !!!!" bit. When and who did you ask, and what did you ask? I could certainly imagine a "No idea" answer if you asked how it happened. We've all looked at the piccies and also can't really imagine what happened, especially since you have said that the rigging is OK. The fact is that there's not much to go wrong with the T/R control system if the last mechanics to touch/adjust the system did what they should, and if there's nothing broken. It's simple and pretty much fool-proof, but fools can be ingenious when they try.