Federal investigators in the United States said that Boeing did not warn pilots about a design feature of the 737 Max 9. We are talking about the fact that when the plane quickly depressurizes, the cockpit door swings open.
In the Alaska Airlines flight incident, this door swung open just seconds after the cabin depressurized.
National Transportation Safety Board Chairwoman Jennifer Homendy said the flight attendant tried to close the cabin door three times, but it hit the restroom door and blocked it.
Boeing has previously been criticized for not sufficiently familiarizing pilots with the features of the 737 MAX 8 lines, in particular, for the lack of proper training in working with the flight control system. “This is yet another round of Boeing failing to communicate with pilots about the details of the airplane's operation, destroying trust and, more importantly, reducing safety margins,” said Dennis Thayer, a spokesman for the Allied Pilots Association.
Homendy said Boeing will make changes to the MAX 9 operating manual to clarify how the doors behave.
In June 2023, the US Federal Aviation Administration announced that it would require a barrier between the passenger compartment and the cockpit on new commercial aircraft entering production in the summer of 2025.
On the night of January 5-6, an Alaska Airlines Boeing 737 MAX 9 made an emergency landing at Portland Airport with the emergency exit door plug torn off. The plane was taking off from Portland, Ontario, but while climbing to 4,800 meters, the plug on the left side of the plane came off, and due to depressurization, the pilots had to return to the departure airport.
United Airlines engineers subsequently discovered loose bolts in emergency exit door covers while inspecting Boeing 737 Max 9 aircraft.
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