Boeing design flaw factor in Lion Air crash

Jakarta: A design flaw, inadequate pilot training and poor flight crew performance contributed to a Boeing jet crashing in Indonesia last year, killing all 189 people on board, investigators said Friday.
The Lion Air disaster was followed months later by a second crash — involving the same model of aircraft — when an Ethiopian Airlines plane went down with 157 people aboard, leading to the global grounding of Boeing’s entire 737 MAX fleet. Indian national Bhavye Suneja, the pilot of the plane, was also killed in the crash. The crashes had thrown a spotlight on the MAX model’s Manoeuvring Characteristics Augmentation System (MCAS), an anti-stall mechanism, that pilots in both planes had struggled to control as the jets careered downwards.
On Friday, Indonesia’s National Transportation Safety Committee said there were flaws in Boeing’s design of the anti-stall system and of its certification by US regulators. “The design and certification of this feature was inadequate,” a summary of the report said, referring the MCAS.
The MCAS was vulnerable to a sole sensor that it relied on for inputs, and 737 MAX pilots were not properly briefed on how to handle a malfunction, it said.
The report also said the emergency was not “effectively managed” by the crew, who had previous performance issues. (AFP)