I know of at least two cases of crashes, one of which killed some high school girls on a senior trip in their hotel room, that were simply botched asymmetrical thrust engine-out training flights.
Yes, we know all about that.
DC-8, Two engines out on the same side, New Orleans, 45 years ago.
Even this was not an emergency until the crew turned it into one.
But you still haven't answered my question. Check your FCOM.