Yes, but the same applies to USAir 427, as well.
Despite hundreds of attempts, they could not repeat the conditions that caused the uncontrolled rudder roll, even using the last unmodified 737 of that type in the world, belonging to Purdue University.
Oh, I remember that evening. Was on a USAir flight in the region. Weather was crystal clear. Received many, many calls from friends and family checking to see whether I was on that flight.