Boeing said on Tuesday it plans to make design changes to prevent a future mid-air cabin panel blowout, like the one in an Alaska Airlines 737 MAX 9 flight in January that spun the planemaker into its second major crisis in recent years.
The National Transportation Safety Board (NTSB) and Boeing said officials still have not determined who removed and reinstalled that plane's door plug during production.
NTSB completed the first of two days of hearings Tuesday that lasted nearly 10 hours into the mid-air emergency that badly damaged Boeing's reputation, led to the MAX 9 grounding for two weeks, a ban by the Federal Aviation Administration on expanding production, a criminal investigation and the departure of several key executives.
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