Originally Posted by
.Scott
If this is what it appears to be - a problem that will need to be addressed by changing firmware and perhaps hardware, then the MAXs may be grounded for weeks or months.
Flight firmware is not quickly developed and certified.
787 was grounded for a month and the solution was a simple cage. I'm 100% sure there is no simple software solution for MCAS. Remember, MCAS is required for (self) certification, so it needs to be there in certain conditions. But it simply can't be there with only two AOA sensors, no matter how you hack it. Whatever you do, it could happen that MCAS does't engage when it should -> hence no certification, or it does when it's deadly.