What's that supposed to mean, Kris? Are you insinuating that you just keep going provided you're within the non-ETOPS rules?
Certain defects may preclude an aircraft from entering the ETOPS area if they occur in flight, I’m not B777 rated but I think a failed engine is likely to be one of them. The post was for info only, PER - SIN can be either ETOPS or non ETOPS depending on the route. We would sometimes downgrade and reroute due to weather not being suitable. Non ETOPS is only a few minutes longer but obviously it adds up.