Originally Posted by
notapilot15
If an IT(information technology) guy has to hazard a guess, it appears MCAS software doesn't cross check/validate sensor data or has no failsafe mechanism before trimming indefinitely. Completely a wild guess.
I'd be surprised if that were the case. The airworthiness regulations require that an aircraft must be capable of 'continued safe flight and landing...after any single failure of the stability augmentation system or any other automatic or power-operated system'. Perhaps there was a 'failsafe mechanism' that didn't work as intended. A latent software problem perhaps?