The Wall Street Journal is now reporting that it will be September or October at the earliest before Boeing submits a final version of the software fix to the FAA which could address the latest flight-control problem that has surfaced. Per the Journal," industry and government officials envision it probably would take a minimum of two more months to win official FAA approval, reach consensus on the extent of extra pilot training and have airlines perform the necessary maintenance checks and procedures."
Looking like 2020 for the reappearance of this MAX bird.