Lion Air families told 737 MAX design flaws linked to deadly crash

A family member of one of the flight attendants aboard the crashed Lion Air flight JT610 speaks to the media in the lobby of the Transport Ministry ahead of the briefing to the families of victims on the final report on the crash in Jakarta, Indonesia, October 23, 2019. REUTERS/Sekar Nasly

JAKARTA (Reuters) - Mechanical and design issues contributed to the crash of a Lion Air 737 MAX jet last October, Indonesian investigators told victims' families in a briefing on Wednesday ahead of the release of a final report.

Contributing factors to the crash of the new Boeing jet, which killed all 189 on board, included incorrect assumptions on how an anti-stall device called the Maneuvering Characteristics Augmentation System (MCAS) functioned and how pilots would react, slides in the presentation showed.