“Former National Transportation Safety Board (NTSB) Air Safety Investigator Gregory Feith joins WIRED to answers the internet’s burning questions about aviation accidents. What’s the safest seat on an airplane? How likely are you to be in an aviation accident? At what stage of flight to most accidents occur? Can a flock of birds really bring down a jet? Why don’t planes have parachutes to prevent crashing? What happens if a window on a plane cracks during flight? And what really happened to Malaysia Airlines Flight 370? Answers to these questions and many more await on Aviation Accident Support.”
There isn’t such a thing really. Any of the exits can be blocked or become inoperable depending on the emergency situation. It’s all dynamic. The best you can do is always listen to the cabin crew. They are not only there to board you and serve you drinks, they have proper emergency training and are invaluable crew members.