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NTSB Report
July 20, 2020 · Robinson R44 Undesignat · N570WH
Dickeyville, WI
Overview
Report Status
Probable Cause
Event Type
Accident
Date
July 20, 2020
Injury Outcomes
No injuries (1 uninjured)
Location
Dickeyville, WI
Aircraft
Robinson R44 Undesignat (1998)
Tail Number
N570WH
Operator
Mf Helicopters
Injuries
None
Aircraft Damage
Substantial
NTSB Number
CEN20CA300
The pilot reported that while performing an aerial application flight at low altitude, the helicopter impacted wires between two poles. He stated the wires were higher than he expected due to the change in terrain contours relative to the poles, and he did not see the wires until just before impact. He then performed a precautionary landing to an adjacent waterway. The helicopter sustained substantial damage to the main rotor blades. The pilot reported that there were no preaccident mechanical failures or malfunctions with the helicopter that would have precluded normal operation.
NTSB Probable Cause
Environmental issues-Physical environment-Object/animal/substance-Wire-Effect on operation - C
Full Narrative
The pilot reported that while performing an aerial application flight at low altitude, the helicopter impacted wires between two poles. He stated the wires were higher than he expected due to the change in terrain contours relative to the poles, and he did not see the wires until just before impact. He then performed a precautionary landing to an adjacent waterway. The helicopter sustained substantial damage to the main rotor blades. The pilot reported that there were no preaccident mechanical failures or malfunctions with the helicopter that would have precluded normal operation.
Flight
Event TypeAccident
Event Time13:40 CDT
Nearest Airport0nm
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftRobinson R44 Undesignat
Tail NumberN570WH
Aircraft CategoryHeli
DamageSubstantial
OperatorMf Helicopters
Operating RulePart 137
Engines1
Engine TypeReciprocating
Engine DetailsLycoming · O-540-F1B5 · Reciprocating · 235
Seats4
People & Injuries
Injury SummaryNo injuries (1 uninjured)
Fatal0
Serious0
Minor0
Uninjured1
Total1
Crew 1Age 42 · First Class · None
Conditions
ConditionsVMC
LightDaylight
Wind310° @ 3 kt
Visibility10 sm
CeilingNone
Temperature / Dew Point63 F
Altimeter30.04 inHg
Observation Time18:35