lennud kahe turbiinmootoriga lennukitel, mille puhul lennuaeg ühe mittetöötava mootoriga reisilennukiirusel (standardatmosfääri tingimustes vaikse ilmaga) marsruudilt kuni sobiva varulennuväljani on suurem käitaja riigi poolt heakskiidetud ajast, any flight by an aeroplane with two turbine power-units where the flight time at the one power-unit inoperative cruise speed (in ISA and still air conditions), from a point on the route to an adequate alternate aerodrome, is greater than the threshold time approved by the State of the Operator, 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