Yeah, it looks like trikes come under HGFA ... now known as SAFA. Would be a shame if we never find out what went wrong. The flight I did was well done - a climb to 4500 over the rough terrain where this accident occurred, with some formation flight, and then a descent on the western side of the cape and some low level over the reef and back down the eastern side, with another climb, then a power-off landing. But it sounds like this flight was a private flight with his wife, so possibly quite a different profile. The canyon is not very far from the departure point.