 One witness recalled seeing the airplane pitch up slightly just before impact. Shortly after impact, the airplane wreckage sank below the surface of the lake. The NTSB report says that the operator, Alaska Float Ratings, stated the flight's purpose was to provide dual-flight training as part of a single-engine sea add-on rating. Alaska Float Ratings also revealed that the planned destination was not Crescent Lake but Bench Lake, which is about 10 miles northeast of Crescent Lake.