Four Whistleblowers Reported 737 Max Problems to the FAA After Fatal Crash

Four different Boeing employees called the whistleblower hotline at America's Federal Aviation Administration after a fatal crash in March, CNN reports: A source familiar with the matter says the hotline submissions involve current and former Boeing employees describing issues related to the angle of attack sensor -- a vane that measures the plane's angle in the air -- and the anti-stall system called MCAS, which is unique to Boeing's newest plane.... The FAA tells CNN it received the four hotline submissions on April 5, and it may be opening up an entirely new investigative angle into what went wrong in the crashes of two Boeing 737 Max commercial airliners -- Lion Air flight 620 in October and Ethiopian Air flight 302 in March. Among the complaints is a previously unreported issue involving damage to the wiring of the angle of attack sensor by a foreign object, according to the source. Boeing has reportedly had previous issues with foreign object debris in its manufacturing process; The New York Times reported metal shavings were found near wiring of Boeing 787 Dreamliner planes, and the Air Force stopped deliveries of the Boeing KC-46 tanker after foreign object debris was found in some of the planes coming off the production line. Other reports by the whistleblowers involve concerns about the MCAS control cut-out switches, which disengage the MCAS software, according to the source. CNN reminds readers that all of Boeing's 737 Max planes worldwide are still grounded

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