Sonic boom? Is it in an area where fighter jets on exercise may pass.
We had two year before last when two Eurofighters were scrambled to intercept a French Boeing 777 passenger jet that had lost radio communications. When they reached the jet the pilot was able to make a prearranged manoeuvre to indicate all was well.
I can only assume that if it went off course and headed towards a city it risked being shot down. A frightening thought.