Single-Engine Helicopter Accident During High Density Altitude Takeoff

Accident Sequence

The pilot reported that he was conducting a high density altitude takeoff in a single-engine helicopter under gusting wind conditions. While accelerating to best rate of climb speed, the main rotor low RPM horn activated at 97 percent. The pilot attempted to increase the main rotor RPM back to 102 percent but was unsuccessful. He aborted the takeoff and sought a landing site near the departure end of the runway. The helicopter subsequently touched down at a high rate of descent in a gravel parking lot adjacent to the airport and rolled over.

Aircraft and Weight

The pilot stated that the helicopter's takeoff weight was 66 pounds below the gross takeoff weight. He reported no mechanical malfunctions or failures with the helicopter that would have precluded normal operation.

Pilot Report

The pilot indicated that the accident could have been prevented by shipping all personal items not required for flight to the next low altitude airport along his route of flight. The helicopter sustained substantial damage to the tail boom assembly and main rotor blades.