Atlas/ Glossary/ Extended Operations (ETOPS)
General
Extended Operations (ETOPS).
Extended Operations (ETOPS)
an airplane flight operation, other than an all-cargo operation in an airplane with more than two engines, during which a portion of the flight is conducted beyond a time threshold identified in part 121 or part 135 of this chapter that is determined using an approved one-engine-inoperative cruise speed under standard atmospheric conditions in still air.
Source
14 CFR § 1.1 →