• Boeing CEO Dennis Muilenburg is testifying before the Senate Commerce Committee on Tuesday, followed by the House committee on transportation on Wednesday
  • It is his first public testimony since two 737 Max crashes killed 346 people. The crashes were caused by a faulty automated system, MCAS, that Boeing installed on the planes.
  • Senators are questioning Muilenburg and John Hamilton, chief engineer of Boeing's commercial airplane division, about MCAS, and how the plane was initially certified as safe to fly.
  • Check back here for live updates from Tuesday's Senate testimony.
  • Visit Business Insider's homepage for more stories .

Exactly one year after a Lion Air Boeing 737 Max crashed in Indonesia , killing 189 people, Boeing CEO Dennis Muilenburg is testifying before the Senate Commerce Committee to explain how the plane was built and certified despite fatal flaws being present.

It is his first public testimony since each of the two jets crashed in October 2018 and in March. Each flight crashed within minutes of taking off. A combined 346 people were killed.

We'll be updating this post as the hearing continues. Refresh this page for more info:

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SEE ALSO: The first Boeing 737 Max crash happened a year ago today here's how the saga unfolded, and the ongoing fallout as the plane remains grounded worldwide