Primary finding
Probable cause
the pilot's improper preflight planning and his failure to maintain control of the helicopter during takeoff. Factors contributing to the accident were the helicopter exceeding its maximum gross weight for takeoff and the high density altitude.
Investigator assessment
Analysis narrative
The helicopter was being operated at greater than its maximum gross weight for takeoff. The airfield was at 6,387 feet mean sea level. The temperature at the time of the accident was 61 degrees Fahrenheit. The pilot said they lifted off and bounced across the ground trying to gain lift. The helicopter then reached a 20 foot drop at the north end of the airport. The helicopter dropped, impacted the terrain and rolled over causing the tail boom to separate, the main rotor blades to bend and fracture, the right skid to separate and the bubble canopy to come off and fragment. The pilot and passenger on board were not injured. The calculated density altitude was 7,914 feet.
Source record
Factual narrative
The helicopter was being operated at greater than its maximum gross weight for takeoff. The airfield was at 6,387 feet mean sea level. The temperature at the time of the accident was 61 degrees Fahrenheit. The pilot said they lifted off and bounced across the ground trying to gain lift. The helicopter then reached a 20 foot drop at the north end of the airport. The helicopter dropped, impacted the terrain and rolled over causing the tail boom to separate, the main rotor blades to bend and fracture, the right skid to separate and the bubble canopy to come off and fragment. The pilot and passenger on board were not injured. The calculated density altitude was 7,914 feet.