Originally Posted by
ocprodigy
Interesting! So they essentially used a route which put the plane in close touch to an airfield in case it had to land.
Probably just a precautionary measure, they wouldn’t be allowed to fly a plane in this day and age if there was genuine threat to human life. Love to find out what the issue was / reasoning behind re-routing though.
Well as OP mentions its an ETOPS question. ETOPS certification is additional over and above general airworthiness and permits twin-engine aircraft to operate over areas where the time to a suitable diversion airport is greater than normal, I think these days ETOPS certifications go as high as 250 minutes or so, which permits virtually everywhere in the world. It seems the maintenance issue caused the ETOPS certification to be temporarily lost, but not impact the overall airworthiness of the aircraft.