The Boeing MCAS story and the fact they were not held accountable at all terrifies me. Not the idea of the augmentation, I kinda understand they needed to fit bigger engines onto their existing frame until they can make and certify a new one. It's not a good solution, but I can understand the business thinking behind it.

Here's where it goes wrong for me.

• Not documenting the MCAS system, in order to cheat the system to not require recertification for the plane. Adding a system that can make trim changes without informing the pilots and that there isn't a documented way to override was an accident waiting to happen.
• Worse to me, is the fact that while the aircraft has two AoA sensors, the MCAS system only takes input from one of them. This is terrifying. There's no way the software can know the inputs could be wrong. So the software would effectively try to kill people all the while thinking it's actually doing you a favour.

It was a debacle that should have been investigated further. Now, it's not fair (although it probably is) to compare Boeing putting their toes into more flight automation against airbus. But the modern airbus jets use multiple sensor sources, and when there is a disagreement, they will reduce flight protections and inform the pilots about it, pilots that will be trained on the various flight modes that can come out of this. Just using one sensor was just a crazy decision, and I bet it was based on cost.

What's going on now though is more a general QC/QA situation. Where I think it overlaps with the MCAS situation is that both the lack of redundancy in MCAS sensor input and the lack of QC in general just reeks of ruthless cost-cutting.