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Aviation Accident

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NTSB Identification: GAA15CA251
14 CFR Part 137: Agricultural
Accident occurred Friday, September 04, 2015 in Fort Pierre, SD
Probable Cause Approval Date: 10/08/2015
Aircraft: AIR TRACTOR INC AT 402A, registration: N321DA
Injuries: 1 Minor.

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 that after conducting a pass over a field during an aerial application flight, he passed clear of a tower but did not see the tower support guy-wires and collided with them. He stated, "After the guy-wire impact there was an immediate sound of the engine starting to lose power and/or shut down." The pilot then performed an emergency landing on a gravel road without further incident. A post flight inspection revealed substantial damage to the fuselage and left wing.

The pilot reported there were no pre-impact mechanical failures or malfunctions with the airframe or engine that would have precluded normal operation.

The National Transportation Safety Board determines the probable cause(s) of this accident as follows:
  • The pilot's failure to maintain obstacle clearance, which resulted in the airplane striking guy-wires during aerial application operations.