To reduce the risk of runway incursion, when lining up and waiting on the runway for more than the expected departure time () seconds, the crew should contact ATC and advise waiting on the runway.

【参考答案】

答案：15在等待起飞时，如果飞机在跑道上等待的时间超过了预期的起飞时间15秒，机组人员应该联系空中交通管制（ATC）并告......

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