A Boeing 737 Max from Alaska Airlines lost the door plug of an unused door opening in the fuselage during flight. Luckily, it could land back safely. The incident happened a few days after the collission of two aircraft at Tokio's Haneda airport. The 737 Max was grounded in 2019 for a long period after two of its type had crashed. And only a few weeks ago, another issue was found within 737 Max airplanes regarding possible loose bolts in rudder control systems.