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Alaska Airlines 737 Max makes emergency landing due to depressurization

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Re: Alaska Airlines 737 Max makes emergency landing due to depressurization

#51

It's Alaska Airlines. I wouldn't read too much into Boeing's reliability from this, given Alaska's previous maintenance record...

Aren’t maintenance protocols handled by the FAA? Otherwise it would be implied that budget carriers like Spirit or Alaska would be “less” safe (which isn’t the case AFAIK).

Re: Alaska Airlines 737 Max makes emergency landing due to depressurization

#52

Earlier quoted context omitted.

"If it's Boeing, I'm not going." I was on a flight that made and emergency landing once, it was TERRIFYING. The pilot circled once then we went down at a very steep angle. What was even worse was the three days we were stranded in Gander Newfoundland while they fixed the plane and then flew in a new crew. It was basically an refueling/military base and not a real airport, no food or facilities. After that I never fle…

> After that I never flew without my toothbrush, change of clothes and contact solution in my carry on. You used to fly without those things? :O

Some people check everything, but it’s a good idea to have enough stuff in your carry on to get you through a lost bag situation.

Re: Alaska Airlines 737 Max makes emergency landing due to depressurization

#53

Earlier quoted context omitted.

The nomenclature is interesting. In my mind, a "depressurization event" would imply that the biggest problem was the depressurization. In other words, that there was not a big gaping structural hole. If there can be a big hole in the plane and we can call that a "depressurization event", I would like to advocate for changing how we describe this.

Man gets shot in the leg. Femoral artery hit. Cause of death: "hypotensive event"

this is extremely common in the US, look at almost any headline in a mainstream newspaper about the police murdering someone.

Re: Alaska Airlines 737 Max makes emergency landing due to depressurization

#55
post #38

Earlier quoted context omitted.

Bad wording on my part since I implied but didn't state the alternative. In my mind, the alternative scenario that would create a depressurization event would be a small hole or a hole that is not visible from the passenger compartment. I.e., a hole from which a passenger or attendant could not exit the plane.

I'm no expert, but I've always assumed these pressurized cabins aren't exactly hermetically sealed, so a small invisible hole wouldn't noticeably depressurize the plane. My assumption has been there's always fresh air actively added continuously at a rate that can compensate for such small leaks, and that it's just an automatically regulated thing. Maybe a gauge/alarm visible to the pilots would indicate an out of sp…

Your assumption is correct - air is pushed into the cabin by the engines, and the pressure is controlled by an outflow valve. An unanticipated hole, assuming it was small enough, would just be compensated for.

Re: Alaska Airlines 737 Max makes emergency landing due to depressurization

#56
post #48
post #28

Earlier quoted context omitted.

Man.. if I hadnt seen it I wouldn't have believed it.That is absurd. How the FAA keeps approving this junk from Boeing is even more concerning than how bad Boeing manufacturing has become.

not much choice. Boeing is practically the only US manufacturer of widebody passenger jets and enjoys a privileged position as such. there is literally no other American competition for passenger air. Alternatives include the Chinese Comac 929, Sukhoi SSJ100, or A320 from Airbus. the first two are non-starters as most north american politicians are furiously opposed to the idea of carriers so much as looking at chine…

Not that I have much respect for modern Boeing, but quoting Wikipedia re Dreamliner:

“The Boeing 787 has been involved in seven accidents and incidents as of November 2023, with zero fatalities and no hull losses.”

Re: Alaska Airlines 737 Max makes emergency landing due to depressurization

#57
post #46

Earlier quoted context omitted.

That sounds lovely, but over here in reality we have: https://en.wikipedia.org/wiki/Helios_Airways_Flight_522 > An investigation into the crash by the Air Accident Investigation and Aviation Safety Board (AAIASB) concluded that the crew had neglected to set the pressurization system to automatic during the take-off checks. This caused the plane not to be pressurized during the flight and resulted in nearly everyone o…

That's pilot error. You have to move multiple safeguards and covers to move it OUT of auto in the first place. There is a reason (very poor training and safety practices, often government corruption as well) that you hear about accidents like that happening in Greece, Vietnam or Ethiopia, not the US.

I feel like you should retract:

> Also, there isn't a "if you forget this everyone suffocates" button.

(Also note that the pilots did not move the pressurization system out of AUTO; you are blaming them for not discovering that a ground engineer had done so, mostly while they fought hypoxia.)

Re: Alaska Airlines 737 Max makes emergency landing due to depressurization

#58
post #46

Earlier quoted context omitted.

That's pilot error. You have to move multiple safeguards and covers to move it OUT of auto in the first place. There is a reason (very poor training and safety practices, often government corruption as well) that you hear about accidents like that happening in Greece, Vietnam or Ethiopia, not the US.

I feel like you should retract: > Also, there isn't a "if you forget this everyone suffocates" button. (Also note that the pilots did not move the pressurization system out of AUTO; you are blaming them for not discovering that a ground engineer had done so, mostly while they fought hypoxia.)

I retract nothing. The cause of that crash was pilot error. They ignored written procedure, and did not react to multiple serious warnings, including the master caution. Which is something you do not ignore. Also note this was still only an issue because the pilots ALSO refused to verify the position of the aft outflow valve. It was the combination of all these things. So no, there absolutely is not a "press this button every flight or everyone suffocates" button.

Re: Alaska Airlines 737 Max makes emergency landing due to depressurization

#60
post #58

Earlier quoted context omitted.

I feel like you should retract: > Also, there isn't a "if you forget this everyone suffocates" button. (Also note that the pilots did not move the pressurization system out of AUTO; you are blaming them for not discovering that a ground engineer had done so, mostly while they fought hypoxia.)

I retract nothing. The cause of that crash was pilot error. They ignored written procedure, and did not react to multiple serious warnings, including the master caution. Which is something you do not ignore. Also note this was still only an issue because the pilots ALSO refused to verify the position of the aft outflow valve. It was the combination of all these things. So no, there absolutely is not a "press this but…

So, what you are trying to say there is no button but a "don't switch this off or everyone suffocates" switch.
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