Boeing has announced an all-stock agreement to acquire Spirit AeroSystems, valued at $4.7 billion, reuniting with its key supplier responsible for the 737 Max jet fuselage. This move marks a departure from Boeing's two-decade outsourcing strategy, aiming to regain control over manufacturing after several quality issues. The deal is expected to enhance oversight and integration of manufacturing and safety systems. Federal investigators traced a door plug panel detached from a 737 Max 9 jet back to its initial installation at Spirit's factory in Wichita, Kansas, before it was sent to Boeing's facility in Renton, Washington for final assembly.