Gentlemen,
Thank you for your comments. I think I have an understanding of the questions I asked. The reason for the questions were as a result of some internal arguments with regards to engine shutdowns. In the normal course of events in reciprocating machinery we have shutdowns on low lube oul pressure, high cooling water temperature and overspeed of the engine. This is normal for a "ship" and canot be overridden by anyone.
It would appear to me from the various commnets, that no such dievice is fitted to aircraft. The Pilots making the judgment on whether or not to shut down the engine based on various circumstances. In my world there is no such thing, if the engine is in danger it will shutdown. Mind you, we can't drop out of the sky!
Thanks again for your valued assistance.