What could be the possible justification for the FAA not grounding these planes? Two planes go down within a short period of time with seemingly similar reasons and they assert this plane is safe? The standard should not be let's wait until we know for sure what happened with the second crash...it should be we should not allow these planes to fly until we are confident they are safe. By grounding them you also give Boeing every incentive to figure out a sure fix for the problem.