Teamwork improves with time: America's National Transportation Safety Board found that 73% of the incidents in its civil-aviation database occurred on a crew's first day of flying together.
The Federal Aviation Administration (FAA), the government agency that regulates civilaviation in the United States, announced new rules this month to combat pilot fatigue.
美国管理民用航空的政府机构联邦航空管理局本月宣布了新规定，以消除飞行员疲劳。
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The civilaviation minister ordered all the planes to be grounded.