Alaska flight incident reveals another feature Boeing didn’t inform pilots about

Politico ^ | 01/09/2024 12:38 PM EST | By ALEX DAUGHERTY

[Red Badger]

Federal investigators said that Boeing didn’t make pilots aware that when a plane rapidly depressurizes, the cockpit door will fly open

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The cockpit door aboard last week’s troubled Alaska Airlines flight surprised the flight crew by swinging open seconds after the fuselage suffered a potentially catastrophic rupture, according to the chair of the federal agency investigating the incident.

National Transportation Safety Board Chair Jennifer Homendy said during a news briefing Monday that the cockpit doors flew open immediately after the paneled-over exit door popped off of the fuselage. A flight attendant had to try three times to get it to close again, Homendy said.

“The cockpit doors flew open immediately and at this point the flight attendant in the forward portion of the aircraft was standing. The cockpit door flew open, hit the lavatory door,” Homendy said. “The lavatory door got stuck. She did attempt to shut the door three times, it eventually shut but it did blow open during the explosive decompression.”

Homendy’s revelation echoes criticism heaped on Boeing during earlier probes of another in the 737 MAX line of planes, the MAX 8, in which pilots said they were not properly trained on a flight control system on board the plane that was implicated in two deadly crashes overseas. In 2020, pilots were required to undergo new simulator training and training for erroneous angle of attack sensor malfunctions as part of the plan to put the 737 MAX back into service.

“It’s another round of Boeing not telling pilots about an airplane detail, which erodes the trust relationship and more importantly it narrows the safety margin.” said Dennis Tajer, a spokesperson for the Allied Pilots Association, which represents pilots from American Airlines.

Homendy said that Boeing would make changes to its MAX 9 manual to make clear that the doors are designed to open.

In June, the FAA announced it will require a secondary barrier between the passenger cabin and cockpit of new commercial planes that are manufactured starting in the summer of 2025.

Oriana Pawlyk contributed to this report.

[Paleo Conservative]

The same plug door is installed on some 737-900ER aircraft including those flown by Alaska and United. Why aren’t those planes being inspected too?

[Red Badger]

HOW OLD ARE THEY?.........

[Paleo Conservative]

2007 to 2019 worldwide. It’s mostly premium carriers that have the plugs installed. It allows the plane to carry 189 passengers which is the maximum certified for the 737-800, 737-900, and Max 8. To have more than 189 passengers, it is required to have another emergency door installed. The 900 and 900ER with plugs carry up to 189 passengers with more pitch between seat rows than the 737-800 or Max 8. This allows more premium seating to be installed.