Missing mother on 737 Max: After inspections, Boeing speaks of an isolated case. Boeing also found an inadequately tightened nut on an aircraft on its production lines.
Quality controls and fasteners have been a big issue at Boeing since a nearly new 737-9 Max tore out a fuselage section in flight in early January. By a lucky coincidence, the two seats directly next to the hole in the cabin wall remained empty. The US investigative agency NTSB came to the conclusion this week that four fastening bolts were missing.