Gear down?
Quoting: "The crew, which included a captain, a first officer on a training flight and a third pilot in the cockpit, "were notified that the left radio altimeter was not working correctly" by a "landing gear must go down" warning signal, Vollenhoven said, adding that "provisional data indicates that this signal was not regarded [by the crew] to be a problem."
So, the gear was not down by the time the AT retarded to idle? Later it was said, the gear sheared off during impact. That makes me wonder if they selected the gear down without checking IAS that would have been low at that time already...