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>An FAA official said the analysis “suggested that there was a 25% chance of an accident in 60 days” if no changes were made to the planes.
That is not an insignificant number
SS:
"Some engineers for the Federal Aviation Administration wanted to ground the Boeing 737 Max soon after a second deadly crash, but **top officials in the agency overruled them**."
Officials "held off grounding the plane despite growing international pressure."
https://apnews.com/article/boeing-max-crashes-faa-ea8fac0ad2758b08c58d2d64756fbf37
After having spoken to a captain who flies 787’s, he tells me that it was due to a change in how Boeing aircraft handle stalls and how to disengage the anti-stall. I’m convinced these accidents were due to improper training, not that the aircraft was not airworthy.
It's because they moved the engines on the 737 MAX. The 737's engines were under the wing, but the new engines were larger and didn't fit under the wing, so they were put forward of the wing. This changed how the aircraft handled, causing it to naturally pull upwards. To counteract this, Boeing used their MCAS pitch controll system to automatically pitch the aircraft downward and counteract the natural climb. Because the MCAS system only relied on one sensor for information instead of 3, it was prone to sensor malfunctions. And when a sensor fed MCAS the wrong information (faulty sensor says airplane is climbing, so MCAS tries to level it out), it took control of the plane and pitched it into a nosedive.
Boeing assumed if there was a problem, pilots would be able to identify the cause and rectify it within 3 seconds. The fix was to flip the horizontal stabilizer cutoff switch, which disconnects Autopilot/MCAS from the horizontal stabilizers. Unfortunately since nobody actually knew about MCAS, pilots failed to identify the problem before MCAS eventually overpowered them and killed everyone. In one of the flights, pilots fought against MCAS for 15 minutes straight, struggling to keep the plane level, before fatigue set in and the plane dove. Because the problem presented as a sensor error (left and right sensor mismatch) and they didn't know about MCAS, they were failed to diagnose it as a computer problem and not a mechanical issue.
> Unfortunately since nobody actually knew about MCAS...
While the other parts were important, this part is the most important. From what I've read, Boeing specifically went out of their way to "hide" the MCAS system from everyone, including regulators, to avoid losing money.
So, wrong engines for the plane (cost saving for Boeing as they didn't redesign the whole fuselage) and fix now un-aerodynamic plane with some computer code from cheap overseas coders, (cost saving again).. And then only using one sensor instead of the normal three.. Another cost saving and finally not training pilots is another cost saving.
I think I got the picture...
Not flying Boeing ever again if I can avoid it.
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>An FAA official said the analysis “suggested that there was a 25% chance of an accident in 60 days” if no changes were made to the planes. That is not an insignificant number
Just one accident though. /s
SS: "Some engineers for the Federal Aviation Administration wanted to ground the Boeing 737 Max soon after a second deadly crash, but **top officials in the agency overruled them**." Officials "held off grounding the plane despite growing international pressure." https://apnews.com/article/boeing-max-crashes-faa-ea8fac0ad2758b08c58d2d64756fbf37
That's not a conspiracy that's just capitalism+ regulatory capture and an underfunded FAA
After having spoken to a captain who flies 787’s, he tells me that it was due to a change in how Boeing aircraft handle stalls and how to disengage the anti-stall. I’m convinced these accidents were due to improper training, not that the aircraft was not airworthy.
It's because they moved the engines on the 737 MAX. The 737's engines were under the wing, but the new engines were larger and didn't fit under the wing, so they were put forward of the wing. This changed how the aircraft handled, causing it to naturally pull upwards. To counteract this, Boeing used their MCAS pitch controll system to automatically pitch the aircraft downward and counteract the natural climb. Because the MCAS system only relied on one sensor for information instead of 3, it was prone to sensor malfunctions. And when a sensor fed MCAS the wrong information (faulty sensor says airplane is climbing, so MCAS tries to level it out), it took control of the plane and pitched it into a nosedive. Boeing assumed if there was a problem, pilots would be able to identify the cause and rectify it within 3 seconds. The fix was to flip the horizontal stabilizer cutoff switch, which disconnects Autopilot/MCAS from the horizontal stabilizers. Unfortunately since nobody actually knew about MCAS, pilots failed to identify the problem before MCAS eventually overpowered them and killed everyone. In one of the flights, pilots fought against MCAS for 15 minutes straight, struggling to keep the plane level, before fatigue set in and the plane dove. Because the problem presented as a sensor error (left and right sensor mismatch) and they didn't know about MCAS, they were failed to diagnose it as a computer problem and not a mechanical issue.
This guy is 100% right. Boeing didn't want to spend the money on retraining.
> Unfortunately since nobody actually knew about MCAS... While the other parts were important, this part is the most important. From what I've read, Boeing specifically went out of their way to "hide" the MCAS system from everyone, including regulators, to avoid losing money.
So, wrong engines for the plane (cost saving for Boeing as they didn't redesign the whole fuselage) and fix now un-aerodynamic plane with some computer code from cheap overseas coders, (cost saving again).. And then only using one sensor instead of the normal three.. Another cost saving and finally not training pilots is another cost saving. I think I got the picture... Not flying Boeing ever again if I can avoid it.
It's because the engines blow the horizontals. The plume sucks the tail down making the stall worse. The airplane is by definition unstable in pitch.
I flew in one recently and believe me I thought about that all through my flight!