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How the Max 9 door plugs are secured
Nice video presentation on how the door plugs at Alaskan Max 9 row 26 are supposed to be kept closed by 4 bolts. The links skips to a that part of a longer presentation. (www.youtube.com) Más...Sort type: [Top] [Newest]
How are they secured? Not well, apparently.
That was a very helpful video. Bottom line is the door is a panel and not a plug. I can pressurize my steam boilers at work, remove nuts and bolts from the man hole plugs and the boiler will remain pressurized and the plugs will be in place a year later.
I flew on a DAL 737 900 two days ago. Before boarding I saw what was definitely a plug a bit aft of the wing from the terminal.
The most troubling part here is that the CVR was "recorded over" huh? GIANT can of worms there...
All crew and passengers survived and can be interviewed. The FDR was not damaged and can be read. ATC communications recordings are available. I don’t think an intact CVR recording is crucial to the investigation.
That said, in general longer-than-2-hour CVR time would be a good improvement.
The most troubling part here is that the door plug blew off!
That said, in general longer-than-2-hour CVR time would be a good improvement.
The most troubling part here is that the door plug blew off!
The door has to be "raised" about 1 1/2 inches to clear the 12 plates that normally hold it against the cabin pressure. The springs on the hinges at the bottom of the door help raise the door when it is opened for maintenance. It is prevented from raising with 4 bolts. My take is these bolts were missing. AAR worked on the aircraft to add Wi-Fi. The 3 pressurization problems started after they worked on the aircraft. When I have a problem I go back to the last thing I did.