Accident Overview
A helicopter accident occurred when the pilot elected to land in a mountainous area under calm wind conditions. According to reports, while at an estimated distance of 350 feet and an altitude of approximately 75 feet above the intended touchdown zone, the nose of the helicopter began a gradual left turn as the pilot applied collective pitch. At about the same time, the pilot noted that the turbine outlet temperature (TOT) was rising and the main rotor RPM was decaying.
Maneuver and Descent
Facing a deep gorge ahead, the pilot executed a left cyclic turn and lowered the collective in an attempt to reach a clearing. As he attempted to stabilize the helicopter, it started to rotate to the right. Subsequently, the rotor low RPM warning light illuminated.
Impact and Condition
The helicopter settled into a juniper tree and rolled over onto its side. The reported air temperature at the crash site was 24 degrees Fahrenheit, and the elevation was 7,150 feet.
Post-Accident Examination
A functional test of the engine revealed that it would operate within its limits. The control continuity could not be estimated due to separation of the tail boom push-pull tube. Reportedly, the main rotor and engine RPM needles had remained joined.