NTSB Identification: LAX07LA173.
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Accident occurred Thursday, May 24, 2007 in Ramona, CA
Probable Cause Approval Date: 09/26/2008
Aircraft: Westland Helicopters Wasp HAS MK1, registration: N612VH
Injuries: 3 Minor,1 Uninjured.

NTSB investigators may not have traveled in support of this investigation and used data provided by various sources to prepare this aircraft accident report.

The pilot reported that during the flight a severe vibration began throughout the helicopter. The pilot was attempting to make a precautionary landing when the tail rotor stuck a tree. Maintenance personnel for the operator indicated that the vibration was due to a failure of one of the snubber dampeners on a main rotor blade.

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

Failure of the pilot to maintain clearance from a tree while performing a precautionary landing. Contributing to the accident was the failure of a snubber dampener that induced a severe vibration in the rotor system.

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