mo4ch:>Boeing delayed fix of faulty 737 MAX alert until 2020, informed FAA only after 1st fatal crash | Mo4ch News

The majority of Boeing 737 MAX aircraft had a non-working alert for faulty sensor data. The company scheduled the problem to be fixed three years after discovering it and didn’t inform the FAA until one of the planes crashed.Two Boeing 737 MAX airliners operated by Lion Air and Ethiopian Airlines crashed five months apart, killing a total of 346 people, and leading to a worldwide grounding of the new model. Both accidents were apparently caused by faulty data from Angle of Attack (AoA) sensors, which made the aircraft software falsely detect impending stalling and pushed the aircraft’s nose down.Pilots were supposed to be alerted about possible problems with the sensors by an AoA Disagree alert, which should light up when data coming from two AoA sensors does not match. But the alert required an optional set of indicators to be installed to actually work, and only 20 percent of the aircraft sold had them. Boeing learned about the situation in November 2017, but considered it a low-ris…