Lion Air crash investigation faults Boeing 737 Max design and oversight
The families of victims in last year's Lion Air crash have been told by Indonesian investigators that poor regulatory oversight and the design of Boeing's 737 Max contributed to the fatal disaster.
Investigators on Wednesday provided victims' relatives with a summary of their final report on the crash, which killed 189 people. Details from the briefing for family members were shared with CNN by Anton Sahadi, a spokesperson for the relatives.
The report summary said that faulty "assumptions" were made during the design and certification of the 737 Max about how pilots would respond to malfunctions by the Maneuvering Characteristics Augmentation System (MCAS), according to the presentation seen by CNN.
MCAS lowers the nose of the plane when it receives information that the aircraft is flying too slowly or steeply, and at risk of stalling. The system was vulnerable because it relied on a single angle of attack (AOA) sensor, investigators said.
The AOA sensor on the doomed Lion Air plane had been miscalibrated during a repair, according to investigators. But the airline's maintenance crews and pilots couldn't identify the problem because one of the aircraft's safety features — the AOA Disagree alert — was not "correctly enabled during Boeing 737-8 (Max) development," they said...
...A spokesman for Indonesia's National Transportation Safety Commission said Wednesday that its final report will publish on Friday.
It has been sent to the US National Transportation Safety Board and other relevant parties, and those parties have replied with comments, the spokesman said.
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