known as a door plug, and there is one on each side of the plane. During the investigation, both Alaska Airlines and United Airlines found loose bolts on their 737-9 Max planes. United Airlines ...

Spirit AeroSystems places the plugs into the Boeing 737 Max 9s in Wichita. According to The Seattle Times, a whistleblower alleges the door plug on the aircraft that had the door blow out on Jan.

In addition to Alaska Airlines, United Airlines also found loose bolts on its own 737-9 Max aircraft. Tuesday's lawsuit accuses Boeing of negligently designing a door plug that was unreasonably ...

More than 1,200 Alaska Airlines and United Airlines flights have been canceled across the U.S. this week after a 737 Max ... some 170 Max 9 aircraft that have similar door plugs as inspections ...

This comes after Alaska Airlines already temporarily grounded its fleet of 65 737-9 Max aircraft on Friday after a door plug detached during Flight 1282 from Portland to Ontario, California.

Four bolts should have kept the left door plug secure to prevent it from moving upwards and disengaging from the Boeing 737 Max 9, National Transportation Safety Board Chair Jennifer Homendy said ...