The Sully case is another on.
The computer would not be trying to guess whether he could make the runway. It would know. It is very simple physics for the computer.
And would it pick the congested hudson river ( not a designated airfield out of reach ) to land ?
Or would it simply bring up the ' does not compute" or ' sorry scully i cannot allow you to do that ? '
Or as was the case for moon landing- computer about to overload and abort sequence ?