But investigators are looking at whether a new software system added to avoid stalls in Boeing’s 737 Max series may have been partly to blame. Faulty data from sensors on the Lion Air plane may have caused the system, known as MCAS, to malfunction, authorities investigating that crash suspect. Boeing’s optional safety features, in part, could have helped the pilots detect any erroneous readings. One of the optional upgrades, the angle of attack indicator, displays the readings of the two sensors. The angle of attack indicator will remain an option that airlines can buy.

Source: New York Times March 21, 2019 09:33 UTC