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The researchers "are aware that they haven't taken into account the mental health trauma that the children may have had, and diet is a big source of the PFASs, and they did a dietary history, but dietary histories have a lot of limitations. So I think there is more work to be done," she said. Yet "this is a very interesting and well put-together paper. It's an important paper and intriguing." 395
The US Federal Aviation Administration (FAA) and European Aviation Safety Agency (EASA) each issued an emergency airworthiness directive on Friday requiring airlines to perform an ultrasonic inspection of certain CFM56-7B engines within 20 days.The FAA and EASA directives came on the same day that the engine manufacturer, CFM International, issued a service bulletin recommending the CFM56-7B engine be inspected more frequently."CFM recommends ultrasonic inspections within the next 20 days to fan blades of CFM56-7B engines with more than 30,000 cycles since new," it said. "Also, it recommends inspections by the end of August for fan blades with 20,000 cycles, and inspections to all other fan blades when they reach 20,000 cycles."After reaching a certain age, the engines should be inspected approximately every two years, the manufacturer said.According to CFM International, about 680 engines will be impacted by the order to inspect engines with more than 30,000 cycles within the next 20 days. More than 150 of those have already been checked by operators, it said.Another 2,500 engines will be impacted by the recommendation to inspect fan blades with 20,000 cycles by the end of August, CFM International said. A jet engine cycle comprises an engine start, takeoff and landing, and full shut down."The inspection, conducted on-wing with an ultrasonic probe along the surface of the fan blade, takes about four hours per engine," the manufacturer said.US federal safety investigators have said the naked eye cannot detect the cracks and signs of metal fatigue that doomed the engine on Southwest Flight 1380. 1627
The White House sees little sign that Gates' cooperation could pose any risk to the President. "There'd be no anxiety here" if Gates cooperated with Mueller in exchange for a plea deal, one White House official said. 216
The US Secret Service just asked for my credential to enter the WH. As I told the officer, I don’t blame him. I know he’s just doing his job. (Sorry this video is not rightside up) pic.twitter.com/juQeuj3B9R— Jim Acosta (@Acosta) November 8, 2018 246
The sailors missed birthdays, holidays and anniversaries, but they received a warm welcome from their loved ones after reaching the San Diego homeport Tuesday. 159
来源：资阳报