HC,
I genuinely hope you are right and I am over reacting. If these three incidents are the only gearbox malfunctions ever experienced by the Puma family then I certainly am and stand corrected. All I hope is that EC catch all their mice so we can sit back and know the MGB is going to work every time, all the time. And that goes for every helicopter manufacturer.
FERetd,
As you point out the thread on the Jesus nut (although big helicopters have a lot more than one) doesn't transmit torque. Colibris solution appears to have a thread that transmits torque, just like a bottle top.