The National Transportation Safety Board chairwoman says heroic actions by the crew aboard an Alaska Airlines flight ensured everyone survived last year when the door plug panel blew out of the plane.

While it feels like Boeing has been the subject of an endless stream of worrying quality control discoveries, it's been 18 months since a door plug blew out on a Boeing 737 Max at 14,830 feet over Portland,

The AS1282 incident in 2024 won't occur again with this new door plug. Here's how, and why was this change necessary?