An operational check of each part or system operated by the crew while in flight to establish that, during flight, instrument readings are within normal range.

当飞行时飞行员可以操纵的每一个系统或部件都要进行操纵，以确定量产飞机与原型机有着相同的性能；在飞行期间，仪表读数要在正常范围之内。

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An operational check of each part or system operated by the crew while in flight to establish that, during flight, instrument readings are within normal range.

当飞行时飞行员可以操纵的每一个系统或部件都要进行操纵，以确定量产飞机与原型机有着相同的性能；在飞行期间，仪表读数要在正常范围之内。

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