I have recently been reading about the issues with the Apache's (AH-64) strap packs. I've read that the strap pack holds the rotor blades on to the hub.
However, it appears the blade also connects to the pitch housing assembly. So I don't really understand the function of the strap pack and why it's failure would cause a catastrophic failure leading to loss of aircraft.
What is the Function of the Strap Pack?
Why does its failure lead to loss of aircraft?
Is this a common design on other helicopters?