The strike also comes as Boeing's commercial arm refocuses on production quality following a 2024 incident where a door plug blew off the fuselage of a 737 MAX in mid-flight. The National Transportation Safety Board in its investigation found that "Boeing's failure to provide adequate training, guidance and oversight" of its factory staff ultimately led to the incident, according to an executive summary of the report published in June. (Boeing responded at the time that it regretted the accident and was focusing on improving its safety culture.)