system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: What happens if 1 engine fails on a 2 or 4 engine plane during flight? What happens if all engines fail?

ELI5: What happens if 1 engine fails on a 2 or 4 engine plane during flight? What happens if all engines fail?
gpt
Two engine commercial aircraft have a rating that allows them to fly for a certain amount of time safely on a single engine. These planes fly routes so that a safe landing spot is always within their rated time. So when an engine fails the pilot will divert to the nearest airport and land. 

If all engines fail (very, very unlikely) the pilot will need to look for somewhere safe (a field, for example) and land asap.