NTSB Identification: CHI08CA254.
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Accident occurred Thursday, August 14, 2008 in Kenyon, MN
Probable Cause Approval Date: 09/26/2008
Aircraft: Bell 47G-3B, registration: N47AH
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.

The pilot reported he had flown the helicopter on several aerial application flights earlier in the day, and that the humidity had increased as the weather cleared. He stated that the initial takeoff was normal, but that when he was about 100 yards from the support truck, the rotor rpm began to decay, and the helicopter settled into a soybean field. The spray boom caught in the crop, and the helicopter pitched forward, which resulted in the main rotor blades contacting the ground. The aft section of the tail boom, including the tail rotor, separated from the helicopter. The pilot reported there was no mechanical malfunction/failure with the helicopter. He did report that he should have decreased his load due to the weather conditions.

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

The pilot's inadequate preflight planning which resulted in the helicopter settling with power.

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