NTSB Identification: DFW07LA116.
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Accident occurred Thursday, May 10, 2007 in Morgan City, LA
Probable Cause Approval Date: 08/30/2007
Aircraft: Robinson R22 Beta, registration: N437EM
Injuries: 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 reciprocating-engine powered helicopter lost engine power while in cruise flight. The 115-hour student helicopter pilot reported that the helicopter was in cruise flight at 1,500 feet when he "felt a change in torque or something." The pilot activated the carburetor heat and the engine power slowly decayed. The pilot initiated an autorotation to a marsh area. During the forced landing the main rotor blade contacted and separated the tailboom assembly. Post-examination of the airframe and engine did not reveal any pre-impact anomalies. The carburetor heat control was found in the automatic mode, the engine sparkplugs appeared normal, and there was approximately a half-tank of fuel in the helicopter's fuel cell. The reason for the reported loss of engine power could not be determined.

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

The loss of engine power for undetermined reasons. A contributing factor was the lack of suitable terrain for the forced landing.

Full narrative available

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