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Originally Posted by Lubicon
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I wonder if Boeing is testing these flights with defective AOA sensors onboard as part of the test, or just testing these in normal conditions. I can't imagine many pilots wanting to test in similar real-life conditions as the 2 crashes.
There is also a lot of unanswered questions from the Ethiopian flight despite the preliminary report. Out of all this however I am surprised at how little scrutiny the AOA sensor maker has seen, considering malfunctioning sensors were the center of at least 3 plane crashes.
https://www.heraldnet.com/nation-wor...-had-problems/
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Angle-of-attack sensors have been flagged as having problems more than 50 times on U.S. commercial airplanes over the past five years, although no accidents have occurred over millions of miles flown, according to reports made to the Federal Aviation Administration’s Service Difficulty Reporting database. That makes it a relatively unusual problem, aviation experts said — but also one with magnified importance because of its prominent role in flight software.
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Placing too much trust in the sensors can cause trouble. One of the most serious crashes tied to angle-of-attack sensors occurred in 2008, when XL Airways Germany Flight 888T hit the Mediterranean Sea, killing seven people. French authorities blamed water-soaked angle-of-attack sensors on the Airbus 320, saying they generated inaccurate readings and set up a chain of events that resulted in a stall.
According to investigators, the downed airplane’s sensors were made by Rosemount, the same company that made the sensors on the Lion Air crash. At the time, Rosemount was also called Goodrich, the company that owned the aerospace manufacturer at the time.
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Near disaster could have also happened on an A320, that uses similar anti-stall software and got impacted when 2 of 3 AoA sensors were faulty.
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One important difference between the Lufthansa incident and the two 737 MAX crashes, aviation experts said, was where they occurred.
The Lufthansa plane was soaring at 31,000 feet when it launched into a steep dive. It dropped 4,000 feet in less than a minute before the pilots wrestled back control.
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