Most jet aircraft fly most efficiently fly above 30,000 ft and have a celling around 41,000 ft. What would happen if an aircraft was to fly over it's service celling? I have read this statement:
The Next Geneartion Boing 737 is certified to fly up to 41,000 feet -- but in theory, it could go higher if they really wanted to. Military and experimental planes can fly much higher (85-96K). What is really weird is that it seems like the limiting factor at high altitudes is that the air becomes too thin to run the jet engines -- not too thin to continue to provide lift.
Is that true? Is it possible? Would there be structural / pressurisation issues. How likely is this to happen?