The National Transportation Safety Board and Boeing said they still have not determined who removed and reinstalled that plane's door plug during production.
National Transportation Safety Board 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.
Boeing's Senior Vice President for quality, Elizabeth Lund, told the hearing the planemaker is working on design changes that it hopes to implement within the year and then to retrofit across the fleet to prevent a future incident.
--Reuters--