I also wonder if the fact that Boeing is a US company has anything to do with it. If this was an Airbus would the US have required grounding of the planes? I be

I also wonder if the fact that Boeing is a US company has anything to do with it. If this was an Airbus would the US have required grounding of the planes? I believe your point about if it happened in the US they would still have been grounded but perhaps if it wasn't a US company they would have pushed for grounding to be safe even if it did not occur in the US.