4 ms·
It's been a while and I don't remember the details, but if I remember correctly US airlines' aircraft were equipped with dual airspeed sensors, or some other se
by dotancohen 2y ago
It's been a while and I don't remember the details, but if I remember correctly US airlines' aircraft were equipped with dual airspeed sensors, or some other sensor. Or both sensors were used as inputs to the MCAS.
- belter 2y agoThey always had two, but the disagree alert was the extra. It's still mindblowing when you read again the details, and realize nobody went to prison... https://en.wikipedia.org/wiki/Maneuvering_Characteristics_Augmentation_System https://en.wikipedia.org/wiki/Maneuvering_Characteristics_Au...
- UltraSane 2y agoNot only did no one go to prison but Boeing got an incredibly generous deferred prosecution deal that said that if they didn't break the law for two years the government would drop the charges and then Boeing couldn't even do that and then plead guilty. But they only get a pretty tiny $243.6 million fine
- foldr 2y agoI don't think the disagree alert would have helped. Pilots weren't trained on MCAS, so they wouldn't have thought "oh, the AoA sensors disagree, so I'd better switch to manual trim".
- sofixa 2y ago> Pilots weren't trained on MCAS And it wasn't referenced anywhere other than the glossary which explained what the abbreviation meant, so they had no chance.
- sokoloff 2y agoBoth MCAS crashes would have been avoided if the crew correctly executed the memory-item runaway stab trim checklist. (The second crew almost saved it by first correctly executing that checklist, then reversing that corrective action while trying to recover, after which point the flight was lost.) That’s what Boeing was counting on (and was terribly wrong in retrospect).
- foldr 2y agoIndeed. I made the same point here: https://news.ycombinator.com/item?id=42295005 https://news.ycombinator.com/item?id=42295005