Boeing's Mechanics Reinstalled Door Plug that Blew Off Alaska MAX 9 Jet - Seattle Times

According to the Seattle Times, the recent incident involving an Alaska Airlines MAX 9 jet has been linked to the installation of a door plug, which was removed for repair and reinstalled by Boeing's mechanics at its Renton assembly line. The National Transportation Safety Board is currently investigating the details of the incident. Reportedly, the door plug, which is equipped on some 737 MAX 9s, is used in place of an additional emergency exit, and regulators have grounded 171 planes to allow airlines to inspect these aircraft.

Responsibility and Oversight

The installation and checking of the door plug, made by fuselage supplier Spirit AeroSystems, has raised questions about the responsibility between Boeing and its former unit. While sources claim that Boeing typically removes and replaces the panel, a source familiar with Boeing's standard industrial processes stated that Boeing only adjusts or removes the panel if there are signs of incorrect installation. The NTSB has not yet determined whether the plug was properly attached or if the bolts were installed securely.

Comments and Reactions

The report from the Seattle Times also referenced an anonymous commenter on an article from the aviation website Leeham News, adding to the growing interest in the issue of who conducted the final fitting. Both Boeing and Spirit AeroSystems declined to comment on the matters being investigated by the NTSB.

Market Response and Industry Challenges

As a result of this incident, Boeing shares were down 0.9% on Wednesday, while Spirit AeroSystems shares rose 2.8%. Industry experts noted that the aerospace industry has faced challenges in its supply chain due to the COVID-19 pandemic, resulting in an unusual sequence of work being carried out in aerospace factories. This has made it difficult for external parties to track the handling of specific parts on a continuous basis.

Implications and Safety Concerns

With the ongoing investigation and the implications for aircraft safety, the significance of proper installation procedures and oversight in aerospace manufacturing has come to the forefront. The Seattle Times' report has raised important questions about the responsibilities of different stakeholders in ensuring the safety and reliability of aircraft components.