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- We have a preliminary report from Lion Air, including a Emergency Airworthiness Directive and a Airworthiness Directive suggesting MCAS (w/faulty single AOA s

- We have a preliminary report from Lion Air, including a Emergency Airworthiness Directive and a Airworthiness Directive suggesting MCAS (w/faulty single AOA sensor) was closely tied to the accident. - The Lion Air flight had a certain aerial profile before the crash (a wave, as MCAS fought the pilots). - The Ethiopian Airlines aircraft has the same tell tale aerial profile It would be better to have the black box data from Ethiopian Airlines, but the local authorities have said they're going to take weeks. In the meantime given the facts we have, there are reasons to suspect that Lion Air and Ethiopian Airlines had a similar cause. Additionally Boeing has also implicitly admitted there are issues, they're actively working on improvements to MCAS due out in April.

js2 8y ago
At least according to Southwest’s pilots union SWA has seen no MCAS issues in its fleet (edit: this may not be correct - see reply from antsar) and its pilots are prepared to handle any MCAS issue were it to occur.[1] I think a worse scenario is if the Ethiopian flight crashed due to some other not yet known issue specific to the Max. [1] https://swaparesources.s3-us-west-2.amazonaws.com/assets/pdf/Press_Releases/Ethiopian_Airlines_Flight_302_Update_2.pdf https://swaparesources.s3-us-west-2.amazonaws.com/assets/pdf...
- dsfyu404ed 8y ago
  Why is this down-voted? Your first statement is a statement of fact with a citation. Your second statement is a perfectly reasonable opinion (in what universe is a second distinct crash causing defect not worse?). It seems like anyone who dares say something that isn't proclaiming enthusiastic, blind and unquestioning support for the "ground them all this nanosecond, this problem is unambiguously MCAS related" line of reasoning is getting down-voted in every comment thread covering this topic. Personally I agree with that line of thinking but the Reddit-like "bury everyone who doesn't think what I think" behavior is off putting.
  - freehunter 8y ago
    The number of times I have seen "why is this being down voted" over the past week or so is absolutely insane. More so when most of the subjects of the downvoting complaints aren't actually below 0. People need to chill about about voting. The guidelines even say "don't complain about votes". https://news.ycombinator.com/newsguidelines.html https://news.ycombinator.com/newsguidelines.html
    - dsfyu404ed 8y ago
      >The number of times I have seen "why is this being down voted" over the past week or so is absolutely insane. The number of otherwise benign comments that get down-vote bombed in all the Boeing threads over the past week has been insane. It's no wonder that complaining increased with it. Usually when there's a majority/minority opinion split on an issue around here the minority opinion doesn't get buried like it has on this issue. It's not surprise that some people don't like that change in community standards. >People need to chill about about voting. The guidelines even say "don't complain about votes". The guidelines also say "Please respond to the strongest plausible interpretation of what someone says, not a weaker one that's easier to criticize. Assume good faith." Which exactly nobody in any of these threads is doing.
  - dang 8y ago
    Would you please stop breaking the site guidelines? And start posting civilly and substantively, or not at all? https://news.ycombinator.com/newsguidelines.html https://news.ycombinator.com/newsguidelines.html
- Someone1234 8y ago
  Southwest is also a unique case, as they had their Max 8s fitted with a sensor and warning to indicate problems with the AOA sensor that it implicated with MCAS. So Southwest's position is rational, but doesn't scale well to other airlines using the standard Max 8.
  - weaksauce 8y ago
    It’s kinda absurd that a single sensor malfunction can lead to an accident like the lion air one. It’s also kinda absurd that critical sensor failure monitoring be sold as an up-sale.
- antsar 8y ago
  > SWA has seen no MCAS issues in its fleet I don't see how your link supports this. Closest I found in the text: > Southwest has compiled and analyzed a tremendous amount of data from more than 41,000 flights operated by the 34 MAX aircraft on property, and the data supports Southwest's continued confidence in the airworthiness and safety of the MAX. That doesn't preclude having experienced MCAS issues while remaining confident in their pilots' ability to overcome the issues.

js2 8y ago

At least according to Southwest’s pilots union SWA has seen no MCAS issues in its fleet (edit: this may not be correct - see reply from antsar) and its pilots are prepared to handle any MCAS issue were it to occur.[1] I think a worse scenario is if the Ethiopian flight crashed due to some other not yet known issue specific to the Max. [1] https://swaparesources.s3-us-west-2.amazonaws.com/assets/pdf/Press_Releases/Ethiopian_Airlines_Flight_302_Update_2.pdf https://swaparesources.s3-us-west-2.amazonaws.com/assets/pdf...

dsfyu404ed 8y ago
Why is this down-voted? Your first statement is a statement of fact with a citation. Your second statement is a perfectly reasonable opinion (in what universe is a second distinct crash causing defect not worse?). It seems like anyone who dares say something that isn't proclaiming enthusiastic, blind and unquestioning support for the "ground them all this nanosecond, this problem is unambiguously MCAS related" line of reasoning is getting down-voted in every comment thread covering this topic. Personally I agree with that line of thinking but the Reddit-like "bury everyone who doesn't think what I think" behavior is off putting.
- freehunter 8y ago
  The number of times I have seen "why is this being down voted" over the past week or so is absolutely insane. More so when most of the subjects of the downvoting complaints aren't actually below 0. People need to chill about about voting. The guidelines even say "don't complain about votes". https://news.ycombinator.com/newsguidelines.html https://news.ycombinator.com/newsguidelines.html
  - dsfyu404ed 8y ago
    >The number of times I have seen "why is this being down voted" over the past week or so is absolutely insane. The number of otherwise benign comments that get down-vote bombed in all the Boeing threads over the past week has been insane. It's no wonder that complaining increased with it. Usually when there's a majority/minority opinion split on an issue around here the minority opinion doesn't get buried like it has on this issue. It's not surprise that some people don't like that change in community standards. >People need to chill about about voting. The guidelines even say "don't complain about votes". The guidelines also say "Please respond to the strongest plausible interpretation of what someone says, not a weaker one that's easier to criticize. Assume good faith." Which exactly nobody in any of these threads is doing.
- dang 8y ago
  Would you please stop breaking the site guidelines? And start posting civilly and substantively, or not at all? https://news.ycombinator.com/newsguidelines.html https://news.ycombinator.com/newsguidelines.html
Someone1234 8y ago
Southwest is also a unique case, as they had their Max 8s fitted with a sensor and warning to indicate problems with the AOA sensor that it implicated with MCAS. So Southwest's position is rational, but doesn't scale well to other airlines using the standard Max 8.
- weaksauce 8y ago
  It’s kinda absurd that a single sensor malfunction can lead to an accident like the lion air one. It’s also kinda absurd that critical sensor failure monitoring be sold as an up-sale.
antsar 8y ago
> SWA has seen no MCAS issues in its fleet I don't see how your link supports this. Closest I found in the text: > Southwest has compiled and analyzed a tremendous amount of data from more than 41,000 flights operated by the 34 MAX aircraft on property, and the data supports Southwest's continued confidence in the airworthiness and safety of the MAX. That doesn't preclude having experienced MCAS issues while remaining confident in their pilots' ability to overcome the issues.