The plane has backup systems
Ninety-six per cent of jetliners Boeing delivers today are twin jets, meaning they have two engines. These planes can fly on only one engine for extended periods of time, and fly on routes laid out to keep them within a safe distance of an airport at all times, should one fail. The probability of both engines failing at the same time is less than one in a billion hours of flight.
Originally published as 6 Facts About Flying That Will Help You Stay Calm on Your Next Flight on ReadersDigest.com.