I hope r304ndy meant his post for the other thread. thefacts reported this 3 days ago, as MarkD noted, in the other thread as the news unfolded:
The test is a normal part of the ground testing of the aircraft, and the results exceeded expectations - the gear is tested to failure. All is fine. The test consists of towing the aircraft, at maximum weight, forward, backward, in normal turns, in tight turns, and laterally.
Towing the aircraft laterally at MTOW would do the sort of damage we saw in the photos, and it fits the pattern of skid marks. The above analysis though has been very useful because it has thrown some light of the phenomenon of groove breakage [on grooved runways] which was being puzzled over in another forum, and we now have a better model to understand what is causing it and how to test for it.