NTSB Identification: CEN13LA325
14 CFR Part 91: General Aviation
Accident occurred Thursday, June 06, 2013 in New Braunfels, TX
Probable Cause Approval Date: 01/30/2014
Aircraft: Robinson Helicopter Company R22 Beta, registration: N137DF
Injuries: 1 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, after completing a low pass and while in a climbing right turn, he heard the engine "sputter" and then noted that both the engine and main rotor speeds had dropped. The pilot stated that he entered an autorotation to a field because there was not enough altitude to fully recover from the partial loss of engine power. The helicopter bounced during the initial collision with terrain. A postaccident examination of the helicopter and an operational test run of the engine did not reveal any preaccident mechanical malfunctions or failures that would have prevented normal operation.
The National Transportation Safety Board determines the probable cause(s) of this accident to be: The pilot's improper flare during an autorotation, which resulted in a hard landing, and a partial loss of engine power for reasons that could not be determined because the examination of the engine did not reveal any anomalies that would have precluded normal operation. Full narrative available
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