Boeing engineers identified a fault with a pilot warning system on its 737 MAX aircraft in 2017.
File: More than 300 Boeing 737 MAX jets have been grounded worldwide after 346 people died in two crashes, one in Indonesia in October and one in Ethiopia last month.WASHINGTON - Boeing engineers identified a fault with a pilot warning system on its 737 MAX aircraft in 2017, a year before the deadly Lion Air crash, the company said Sunday.
According to Boeing, a supposedly standard piece of equipment that tells pilot about disagreements between angle of attack indicators -- which measure the plane's angle vis-a-vis oncoming air to warn of impending stalls -- did not, in fact, activate unless an additional optional indicator was purchased by airlines.That left airlines that did not buy the optional indicator -- including both Lion Air and Ethiopian Airlines -- without the safety feature.
"In 2017, within several months after beginning 737 MAX deliveries, engineers at Boeing identified that the 737 MAX display system software did not correctly meet the AOA Disagree alert requirements," the aircraft manufacturer said in a statement."The software delivered to Boeing linked the AOA Disagree alert to the AOA indicator, which is an optional feature," it said.
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