Wake turbulence between the two aircraft as well as engine performance and flight control responsiveness in the stratosphere were evaluated.

两架飞机之间的尾流以及在平流层飞行时的发动机性能和飞行控制响应都进行了评估。

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Instead, just two hours into the flight, an engine oil warning message forced the pilot to turn back for an emergency landing.

然而，大约飞行两小时后，由于燃油报警，飞机被迫回到新加坡紧急降落。

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Instead, just two hours into the flight, an engine oil warning message forced the pilot to turn back for an emergency landing.

然而，大约飞行两小时后，由于燃油报警，飞机被迫回到新加坡紧急降落。

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