Shortly after takeoff from Portland a door plug, a panel installed to replace an optional emergency exit door, on the Boeing 737 MAX 9 aircraft blew out causing an uncontrolled decompression of the aircraft. wikipedia 
Image from the NTSB investigation of the Jan. 5 accident involving Alaska Airlines Flight 1282 on a Boeing 737-9 MAX. Captured on Jan. 7.
The flight was nearly over my home when the depressurization occurred. enlarge 
What's wrong with this design? Pressure pushes the plug out of the cabin instead of holding it in place. There can be 20,000 lbs of force on the plug depending on the inside/outside pressure differential. mastodon
force = psi * length * width
The fuselage and door plug are manufactured and initially assembled by Spirit AeroSystems in Wichita, Kansas, then shipped by train for final assembly at the Boeing Renton Factory.
We enjoyed brunch at the Hyatt Regency and a walk to Bird Island in Renton next door to the Boeing assembly plant. May 30, 2023.
I was interested to see aircraft bodies loaded on flatbed rail cars probably headed to the assembly plant in Renton. May 28, 2023.
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Spirit AeroSystems is the sole supplier of the fuselages used in many Boeing jets, including the Alaska plane that made the emergency landing. The company, which had 15,900 workers in four U.S. factories at the end of 2019, laid off thousands of people in Wichita at the height of the pandemic. When it needed to ramp back up, not only did Spirit have fewer people on site, the company had lost years of expertise. There were fewer experienced mechanics, but also fewer experts who could inspect the quality of their work. slashdot
The fuselage panel that blew off an Alaska Airlines jet earlier this month was removed for repair then reinstalled improperly by Boeing mechanics on the Renton final assembly line, a person familiar with the details of the work told The Seattle Times. slashdot