Accident Sequence
The pilot reported that during a steep turn approximately 60 ft above ground level (AGL), the engine sputtered. The pilot reduced power and attempted to land in a clearing, but the engine quit shortly thereafter. During the subsequent autorotative descent, the main rotor blades contacted trees. After touchdown on the ground, the main rotor blades contacted the tail boom.
Post-Accident Examination
Following the accident, the pilot was observed looking into the fuel tank. The helicopter was moved after the accident without permission from the National Transportation Safety Board (NTSB) or the Federal Aviation Administration (FAA); therefore, the fuel quantity could not be determined. The helicopter was later located, and an examination of the engine and its components revealed contaminants in the carburetor bowl. The engine was started and found to operate normally.
Determination
No determination could be made as to the reason for the loss of engine power. The source did not assign a probable cause.