407 Aeros
The issue here is that Bell were contacted on the day and asked whether the machine was capable of doing the manoevre as described. They acknowledge that their test pilots do similar manoevres in the 407. The manual says that such manouvres are not approved.
Now if Bell were to sit back and say that after a brief inspection the helicopter could carry on flying, and after another couple of hundred hours some component should fail, maybe not even related to the incident, Bell would be liable for some HUGE claims.
The insurance and product liability mindset of the Yanks is actually to blame here. What is the solution? Change all the components that could possibly be stressed during such a manoevre and then you can claim that they could have no part in a subsequent failure.