The black box has been recovered. The data is probably being recovered as we pontificate. Within the next 48-72 hours I expect someone will know definitively if

The black box has been recovered. The data is probably being recovered as we pontificate. Within the next 48-72 hours I expect someone will know definitively if the MCAS system was even active, and if trim was a factor in this crash. Given that this significant data point is hours or just a couple days away, isn’t it prudent to get the data before grounding the fleet? If the jet had been brought down intentionally, should the FAA have grounded the aircraft? Crashes like this are so incredibly rare, and on a new aircraft perhaps the easy decision is to just ground it. But shouldn’t that require actual evidence on the cause of the crash? Witness accounts are of the plane trailing smoke and debris, but I don’t trust those at all. I feel like given that we will know definitively if trim was a factor in the crash so soon, a decision should only be made once that is known.