engine separation

[WMUSIGPI]

Just look up the thread about the British Airways 747 that decided to fly LA to London on 3 engines.

 

[Crizz]

Supposedly the Avro will maintain upper 20s on 3 engines, and 12-15k' on 2. 1 engine is a controlled descent. Theres even provisions to do a 2 engine go around.