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Boeing Max Design, Airline Maintenance Faulted in Lion Air Crash

  • Indonesian crash report summarized for relatives of victims
  • Reliance on one sensor made flight-control system vulnerable
Investigators examine engine parts from Lion Air flight JT 610, Nov. 2018.
Investigators examine engine parts from Lion Air flight JT 610, Nov. 2018.Photographer: Bay Ismoyo/AFP via Getty Images
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Design flaws in Boeing Co.’s 737 Max, a failure to share vital information with pilots and airline maintenance stumbles contributed to last year’s crash of Lion Air Flight 610, which killed 189 people, investigators have concluded.

In a nine-point presentation to victims’ families prior to the Friday release of a formal crash report, the Indonesian National Transportation Safety Committee criticized the jet’s certification, saying that a now infamous flight-control mechanism was approved based on incorrect assumptions. The Maneuvering Characteristics Augmentation System has been implicated separately in the crash of an Ethiopian Airlines 737 Max in March that claimed 157 lives.