Alaska Airlines timeline: How incident involving missing door plug unfolded

The defective door plug on an Alaska Airlines plane that forced an emergency landing is just the latest dangerous incident to occur with this type of aircraft.

The defective door plug on an Alaska Airlines plane that forced an emergency landing as a door-sized hole opened up in the plane mid-flight is just the latest dangerous incident to occur with this type of aircraft.

The Boeing 737 Max has been under public scrutiny for several years following multiple crashes and malfunctions.

The occurrences include a Lion Air Flight 610 that killed 189 people when it crashed in Indonesia in October 2018 and Ethiopian Airlines Flight 302 that killed 157 people when it crashed in waters northeast of Jakarta -- both Boeing 737 Max 8 planes, a previous version of the aircraft.

Black box data from the Lion Air jet revealed the pilots struggled to fight the plane's malfunctioning safety system from takeoff to the moment it nose-dived into the Java Sea. A report by Indonesia's National Transportation Safety Committee found that there were detrimental problems with the left angle of attack (AOA) sensor.