What is ETOPS and its rules?

ETOPS used to stand for Extended Twin-Engine Operations, and now is Extended Operations. Originally, it was a certification that permitted twin engine aircraft to fly routes which may, at the time, be greater than 60 minutes flying time from the nearest airport that is suitable for an emergency landing.



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ETOPS is an acronym that stands for “Extended-range Twin-engine Operational Performance Standards”. In 1985, special allowance was given to Trans World Airlines to fly their twin-engine 767 transatlantic from Boston to Paris. This was the first ETOPS certification rating given: ETOPS 120 minutes.

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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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The Twelve-Five Standard Security Program (TFSSP) outlines requirements for FAA Part 135 certificated carriers offering commercial air transport using aircraft with a maximum certificated takeoff weight between 12,500 pounds (5,670 kg) and 100,309.3 pounds (45,500 kg).

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