Tuesday, July 18, 2017

Bell 47D1, N153B: Accident occurred July 06, 2017 in Big Lake, Sherburne County, Minnesota

The National Transportation Safety Board did not travel to the scene of this accident.

Additional Participating Entity:
Federal Aviation Administration / Flight Standards District Office; Minneapolis, Minnesota

Aviation Accident Preliminary Report - National Transportation Safety Board: https://app.ntsb.gov/pdf


NTSB Identification: CEN17LA264
14 CFR Part 137: Agricultural
Accident occurred Thursday, July 06, 2017 in Big Lake, MN
Aircraft: BELL 47D1, registration: N153B
Injuries: 1 Uninjured.

This is preliminary information, subject to change, and may contain errors. Any errors in this report will be corrected when the final report has been completed. NTSB investigators may not have traveled in support of this investigation and used data provided by various sources to prepare this aircraft accident report.

On July 6, 2017, about 1200 central daylight time, a Bell 47D1 helicopter, N153B, had main rotor blade separation and contact with a ground vehicle during the initiation of an aerial application flight near Big Lake, Minnesota. The airline transport pilot was uninjured. The helicopter sustained substantial main rotor blade damage. The helicopter was registered to the pilot and operated by Oleen Ag Air as a 14 Code of Federal Regulations Part 137 aerial application flight. Day visual meteorological conditions prevailed in the area about the time of the accident and the flight was not operated on a flight plan. The local flight was originating at the time of the accident.

According to initial information from the pilot, the main rotor shaft separated while the helicopter was standing with the engine running prior to departure on the flight.

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