Fixed wing pilot here - can only find limited references to this on web - is blowaway power something peculiar to the S-76++?
I assume it's effectively being able to demand over 100 per cent power from both engines to get you out of a tricky situation?
Does the pilot have to manually select it - or does the FADEC automatically feed it in as collective changes are made - and generates some sort of warning that you are temporarily exceeding power limits?