Sad day indeed. I was an instructor there at the time. A panel was recovered from the airfield, after an object was seen to fall from the a/c after its very fast and very low pass. The crew were instucted at the time, about the fact that something had been seen to fall from the a/c, and they were advised to abandon the remainder of their demonstration and land asap. They declined and continued on. During their repositioning over the bay to the S, the a/c crashed into Newgale bay. The panel, I believe, was later identified as being part of an external engine cover.