"A 737 Max jet left a Boeing factory missing four bolts designed to secure a door panel that blew off in mid-flight last month, according to a preliminary report by a US regulator.
The National Transportation Safety Board’s report on Tuesday is the first official account of how the door plug could have fallen out of the fuselage of an Alaska Airlines plane 16,000 feet over Oregon on January 5. The incident has raised questions about manufacturing and safety processes at Boeing and its supplier Spirit AeroSystems, which builds the Max fuselages.
The NTSB said that “four bolts that prevent upward movement of the [door] plug were missing” before the plug detached from the plane.
According to the report, the fuselage arrived at Boeing’s factory in Renton, Washington, in late August 2023. An inspection there uncovered five damaged rivets adjacent to the door plug that later blew out.
In order for a team from Spirit to replace the rivets, the door plug was opened in September, according to the report. A photo shared via text message by Boeing employees after the rivet work showed the door plug later closed again without three of its bolts, while the location of the fourth bolt was obscured in the photo, according to the NTSB."
FT.com
The National Transportation Safety Board’s report on Tuesday is the first official account of how the door plug could have fallen out of the fuselage of an Alaska Airlines plane 16,000 feet over Oregon on January 5. The incident has raised questions about manufacturing and safety processes at Boeing and its supplier Spirit AeroSystems, which builds the Max fuselages.
The NTSB said that “four bolts that prevent upward movement of the [door] plug were missing” before the plug detached from the plane.
According to the report, the fuselage arrived at Boeing’s factory in Renton, Washington, in late August 2023. An inspection there uncovered five damaged rivets adjacent to the door plug that later blew out.
In order for a team from Spirit to replace the rivets, the door plug was opened in September, according to the report. A photo shared via text message by Boeing employees after the rivet work showed the door plug later closed again without three of its bolts, while the location of the fourth bolt was obscured in the photo, according to the NTSB."
FT.com