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NTSB Report
August 14, 2012 · Air Tractor AT-502 · N1021D
Hanley Falls, MN
Overview
Report Status
Final with probable cause
Event Type
Accident
Date
August 14, 2012
Injury Outcomes
1 injury (1 minor injury)
Location
Hanley Falls, MN
Aircraft
Air Tractor AT-502
Tail Number
N1021D
Operator
Northstar Aerospray
Injuries
Minor
Aircraft Damage
Substantial
NTSB Number
CEN12CA546
The pilot was conducting an agricultural application pass at the time of the accident. He was flying near a set of power line support poles on the edge of the field in order to establish a global positioning system reference line for subsequent application passes. He was looking to the left to maintain clearance with the support poles when he observed guy wires in his flight path. He immediately pulled up and rolled to the right; however, the left wing struck a guy wire. The airplane impacted the ground inverted, sustaining substantial damage to the fuselage, empennage, and both wings. The pilot stated that there were no failures or malfunctions associated with the airplane before the accident. He noted that making the guy wires more visible and greater awareness on his part might have prevented the accident.
NTSB Probable Cause
Environmental issues-Physical environment-Object/animal/substance-Tower/antenna (incl guy wires)-Effect on operation - F
Full Narrative
The pilot was conducting an agricultural application pass at the time of the accident. He was flying near a set of power line support poles on the edge of the field in order to establish a global positioning system (GPS) reference line for subsequent application passes. He was looking to the left to maintain clearance to the support poles when he observed guy wires in his flight path. He immediately pulled up and rolled to the right; however, the left wing struck a guy wire. The airplane impacted the ground inverted. The pilot stated that there were no failures or malfunctions associated with the airplane prior to the accident. He noted that making the guy wires more visible and greater awareness on his part might have prevented the accident.
Flight
Event TypeAccident
Event Time16:00 CDT
Nearest AirportPRIVATE (19nm)
Flight Plan FiledNone
Aircraft FireGrd
Aircraft ExplosionNo
Aircraft
AircraftAir Tractor AT-502
Tail NumberN1021D
Aircraft CategoryAir
DamageSubstantial
OperatorNorthstar Aerospray
Operating RulePart 137
Engines1
Engine TypeTurboprop
Engine DetailsP&W Canada · PT6A-34AG · Turboprop · 750
Seats1
People & Injuries
Injury Summary1 injury (1 minor injury)
Fatal0
Serious0
Minor1
Uninjured0
Total1
Crew 1Age 47 · Second Class · Minor
Conditions
ConditionsVMC
LightDaylight
Wind90° @ 4 kt
Visibility10 sm
CeilingNone
Temperature / Dew Point70 F / 59
Altimeter29.93 inHg
Observation Time20:52
Weather SourceWFAC