They say that the pilot is a veteran pilot but does not have a lot of experience flying this aircraft. Government is stating that it is pilot error because a good experienced pilot will use the rudder or angle the plane a bit so it can be stabilized. I believe that he might not have enough time to maneuver the aircraft because of the low altitude and slow speed.
It is a little bit fortunate that this happen on the weekends because a school was terribly hit in this incident.