NTSB Identification: SEA07CA167.
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Accident occurred Monday, June 18, 2007 in Logan, UT
Probable Cause Approval Date: 10/31/2007
Aircraft: Rallison Rotorway 162F, registration: N203XR
Injuries: 2 Uninjured.

NTSB investigators used data provided by various entities, including, but not limited to, the Federal Aviation Administration and/or the operator and did not travel in support of this investigation to prepare this aircraft accident report.

The pilot was maneuvering at low altitude to take pictures of his neighbor's business. Suddenly the helicopter's engine "raced free of load", the needles split and he began an autorotation. The aircraft landed with its right skid up slope, and the helicopter rolled onto its left side. The pilot's postaccident examination of the control panel revealed that he had inadvertently deactivated the aircraft's electric clutch by striking its overhead toggle switch with his head. The helicopter's main rotor blades, one tail rotor blade, right landing skid, left horizontal stabilizer, and the tail boom were bent. The landing skid on the left side collapsed.

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

The total loss of engine power due to the pilot inadvertently deactivating the rotor drive clutch assembly. A contributing factor was the downhill terrain condition where he landed, which exceeded the slope limitations of the helicopter.

Full narrative available

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