And a good one, too! I'm told it takes 6 weeks to get over a ruptured eardrum - not sure I would want to take that risk!
I believe the Canadian government (the labour code guys) have determined that 4 hours helicopter flying is equivalant to 4 hours' hard labour, and double that when longlining. I think I would agree with that, especially when you add the effects of whole-body vibration into the mix.
phil