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U.S. air crash investigators have disputed at least two key findings in a long-delayed report from Ethiopian inspectors on a deadly Ethiopian Airlines crash back in 2019.
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In the report released last Friday, Ethiopian authorities blamed "uncommanded" inputs from Boeing's Manoeuvring Characteristics Augmentation System, known as MCAS.
It says the inputs caused by erroneous data from an underlying sensor led to the plane's nosedive.
But the NTSB begged to differ, saying the faulty sensor may have been damaged by a bird strike right after take-off.
That contradicts the report's finding that no physical clues like a dead bird were found in that vicinity.
The NTSB went on to accuse Ethiopian investigators of implicating the design issues rather than the crew's own training and response to that emergency.
It goes back to March 2019 when Ethiopian Airlines flight 302 crashed killing all 157 people on board.
That, coupled with another MAX crash in Indonesia in 2018, prompted the global grounding of all 737-MAX aircraft that lasted 20 months.
The NTSB contributed to the Ethiopian-led probe because the plane was produced in the United States.
The Board released its own findings on Tuesday after Ethiopian authorities refused to include them in their own draft final report.
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