What does ETOPS 120 mean?

This was the first ETOPS certification rating given: ETOPS 120 minutes. This means that twin-engine aircraft were allowed to fly no more than 120 minutes flying time away from the nearest airport suitable for an emergency landing.



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2015 to fly beyond 180 minutes from an en-route alternate airport, the 747-8's design is approved to conduct 330-minute ETOPS missions. These missions allow operators to fly long-distances more directly on virtually any worldwide city pair routing.

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By far, the best seats to pick on United's Boeing 787 fleet (both the 787-8 and the 787-9) are seats 27A and 27L. Row 27 is the emergency exit row for the economy class cabin. This row is reserved as Economy Plus seating but the two “window” seats, A and L, are not considered Economy Plus seats.

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How long can a 747 fly without engines? For example, with a glide ratio of 15:1, a Boeing 747-200 can glide for 150 kilometres (93 mi; 81 nmi) from a cruising altitude of 10,000 metres (33,000 ft).

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The 747-100, for instance, was tested up to Mach 0.99, almost breaking the sound barrier. Other 747s, such as Air Force One, have approached the sound barrier but never crossed it.

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