True randomness does not preclude clusters of events. In fact that's the nature of random events.
Not saying I think these are completely random. But since we don't even know the cause of the Ethopian crash yet, who's to say? The causes may very well be unrelated.
The FAA is not an agency that should be assuming something is safe by default. It is an agency that should be assuming something is unsafe by default and demanding the manufacturer prove it is safe.
If it's random chance, Boeing should be able to prove it is random chance. Until then, the FAA should ground them.
