There was a Qantas A330 that performed a violent uncommanded maneuver that was attributed to a dodgy nav box that was supplying the FBW system with the next level of efficiencies of automation. As I understand it the nav box sent the flight director a bunch of corrupt messages which then told the autopilot to act like a roller coaster.
The bus's side sticks didn't move during the violent maneuver, had it been a helicopter it would probably have broken itself apart.
I don't want to bag FBW, there is good and bad engineering everywhere, and fortunately the engineering of FBW is maturing quite rapidly with a corresponding price tag to match.
Aren't those little flaperons on Kaman helicopter's main rotor blades electrically controlled, is it a FBW system?