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Cellphones still a flight danger on some Boeing jets

In 2014, there’s an alarming safety notice. Passenger cellphones, other radio signals may crash a few Boeing 737 and 777 aeroplane as thousands of jets have cockpit screens vulnerable to interference from Wi-Fi, mobile phones, weather radar frequencies. Federal Aviation Administration had given airlines until November 2019 to replace the units. But, many planes worldwide still are continuing with vulnerable systems.