NTSB Identification: CEN11CA525
14 CFR Part 137: Agricultural
Accident occurred Wednesday, July 27, 2011 in Nicolett, MN
Probable Cause Approval Date: 10/17/2011
Aircraft: BELL 47G-2A, registration: N7578
Injuries: 1 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.

According to the pilot, during an aerial application flight, he initiated a climbing turn, which he thought did not "feel right." He leveled the helicopter, stopped the turn, lowered the collective and added full throttle. The pilot stated that the rpm indication was in the bottom of the green arc. The helicopter began losing altitude and impacted a cornfield. The pilot indicated that there were no mechanical malfunctions with the helicopter. The helicopter sustained substantial damage when the main rotor separated a section of its tailboom.

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

The pilot's failure to maintain control of the helicopter while maneuvering during an aerial application flight.

Full narrative available

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