Question from a non-pilot, feel free to move if it's the wrong forum.
I know there is a maximum single-engine height but assume that if an engine is lost, descent to this height would be a (relatively) gentle business, whereas an emergency descent due to loss of cabin pressure would be a much more rapid affair.
Would it be normal to tell ATC you were depressurised and descending rapidly, rather than simply that you were single-engined and descending?
No criticism intended - I've dealt with a few "holy sh#t" moments myself and after listening to the recording am reassured by the calm professionalism of crew, ATC and the emergency responders.