NTSB Identification: CEN12LA480
14 CFR Part 137: Agricultural
Accident occurred Wednesday, July 25, 2012 in Akeley, MN
Probable Cause Approval Date: 05/09/2013
Aircraft: Scotts-Bell 47 Inc 47G-2A, registration: N73252
Injuries: 1 Minor.

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 agricultural helicopter pilot reported he was on a “clean up” pass and descending toward the field over a set of power lines when he experienced a slight yaw to the right and felt a slight vibration that seemed to be coming from the rear of the helicopter. When he began to apply left pedal input, the helicopter immediately entered an excessively nose low attitude with increased right yaw. After the pilot applied aft cyclic control, the helicopter impacted terrain and came to rest on its left side. An examination of the helicopter and its systems revealed no preimpact anomalies or malfunctions, and there was no evidence that the helicopter had impacted the power lines. The source of the vibration could not be determined.

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

The pilot’s failure to maintain helicopter control during low altitude agricultural operations.

Full narrative available

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