Large passenger aircraft used by people around the world are usually equipped with multiple engines. If one of them fails, passengers are not in danger.
The plane will not crash and start a rapid descent, but will safely reach the end of the route or at least make an emergency landing at the nearest airport. How it will fly, we told WA Today.
Each engine must develop enough thrust to allow the plane to operate safely if the other one fails. This way, if one engine breaks down, the other will take over.
Without sufficiently powerful engines, an airplane cannot be certified to carry passengers. This helps to avoid a disaster.
Of course, flying on one engine is much more dangerous, as the aircraft remains vulnerable to engine failure, but this is usually enough to get permission to land and change the route to the nearest service.
For example, the Airbus A350XWB has an ETOPS rating of 370 minutes, which allows it to operate on any surface route, except for flights over a small part of Antarctica.