Originally Posted by
sky9
Will the MCAS be certified with what the FAA thought they had agreed in tailplane activation, or with what Boeing actually implemented?
I was going to say 'cheeky!', but in essence, this is the exact point. Can anyone trust Boeing to provide the actual algorithm, as it were, after being so devious in the past?
If I were the FAA (or any regulator) I would want to see a full path analysis of the code, not just the 'happy path' it usually takes but all possibilities. Code coverage in all scenarios. We also know of course the 20/80 rule: that is the processor will be running 20% of the code 80% of the time. I did this test analysis for an app that was basically just an inventory of a portfolio of property contents FGS. It takes a lot of effort and I would be very surprised if anything like that has happened in this case in the time available.