777 unreliable airspeed in cruise
Consider the following: you are flying at a high cruising level in your 777 and experience an AF447 kind of unreliable airspeed situation. According to Boeings memory items you should set 4 degrees of pitch and 70% N1 (at least in the GE model that is) and then consult the NNC which will lead you to the inflight performance tables for accurate values. Personally it doesn't feel quite natural to me and on my last type I was taught that if it flew straight an level for the past hours than it will for the next minute or so until the tables are handy.
Whats your (or your training departments) take on this?