Accident Sequence
The accident flight began at about 1315 local time. The pilot completed the first two maneuvers without incident. The third maneuver was a standard 180-degree 'wing-over' commenced from a standard altitude of 300 feet. According to the pilot, the helicopter failed to fully recover from the descent phase of the maneuver and struck the surface at an estimated speed of 40 to 50 knots. Upon impact, the helicopter rolled onto its left side.
Pilot Background
The pilot reported that the purpose of the flight was to demonstrate the helicopter's performance at an air show. He traveled from overseas by scheduled airline and arrived 2 days before the air show. The day before the accident, he flew the helicopter for 50 minutes of demonstration practice at a density altitude similar to that anticipated for the following day's performance.
Environmental Conditions
The pilot reported that the density altitude at the time of the accident was 8,500 feet. No further weather details were provided.
Pilot Statement
In his statement, the pilot said that the accident could have been prevented "possibly by greater awareness and practice at the local density altitude conditions."