The Cost of Program Error

https://en.wikipedia.org/wiki/Lion_Air_Flight_610#Aftermath

the on-board computer to believe that the aircraft is stalling, causing it to automatically initiate a dive.
All 189 passengers and crew were killed in the accident.

>>26
The sensor was giving wrong data but the technicians didn't have the training necessary to say if it was important, and declared the aircraft flight ready. The pilots did not know because their controls did not show any warning because it was an addon.

https://qz.com/1574441/a-warning-signal-that-could-have-prevented-the-lion-air-crash-was-optional/