RB211(-535) separation
I was once taught that on a B757 RB211 installation (possibly on all RB211s) that if you suffer a dual fire detection loop failure you will get a fire warning. If the engine would separate from the airframe, I suppose that would cause a dual fire loop failure by nature.
Now, I've been through said separation-scenario in the simulator numerous times now but have yet to get the alleged fire warning.
Have I missed something fundamental or are the sims just not up to par when it comes to system simulation?