Thursday, February 11, 2021

Hughes OH-6A, N6639R: Accident occurred February 05, 2021 in Horseshoe Bend, Boise County, Idaho

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.

The National Transportation Safety Board traveled to the scene of this accident.

Additional Participating Entities: 
Federal Aviation Administration / Flight Standards District Office; Boise, Idaho 
USDA APHIS Wildlife Services ; Cedar City, Utah
Rolls Royce 

United States Department of Agriculture (USDA) APHIS Wildlife Services  (WS) Aviation Training and Operations Center (ATOC)

Location: Horseshoe Bend, ID
Accident Number: WPR21LA107
Date & Time: February 5, 2021, 14:00 Local 
Registration: N6639R
Aircraft: Hughes OH-6A 
Injuries: 1 Serious, 1 Minor
Flight Conducted Under: Public aircraft

On February 5, 2021, about 1400 mountain standard time, a Hughes OH-6A, N6639R, was substantially damaged when it was involved in an accident near Horseshoe Bend, Idaho. The pilot sustained serious injuries and passenger sustained minor injuries. The helicopter was operated as a public use flight.

The pilot reported that the purpose of the accident flight was to conduct wildlife damage management operations. While maneuvering at a low altitude over hilly terrain, the pilot noted a loss of rotor rpm. The pilot maneuvered the helicopter down a draw in an attempt to regain rotor rpm. Subsequently, the helicopter impacted sloped terrain, rolled over, and came to rest on its left side.

Photographs provided by local law enforcement revealed that fuselage and tail-boom were structurally damaged. The wreckage was recovered to a secure location for further examination.

Aircraft and Owner/Operator Information

Aircraft Make: Hughes
Registration: N6639R
Model/Series: OH-6A 
Aircraft Category: Helicopter
Amateur Built: No
Operating Certificate(s) Held: None
Operator Designator Code:

Meteorological Information and Flight Plan

Conditions at Accident Site: VMC 
Condition of Light: Day
Observation Facility, Elevation: KBOI,2868 ft msl
Observation Time: 13:53 Local
Distance from Accident Site: 26 Nautical Miles
Temperature/Dew Point: 8°C /-1°C
Lowest Cloud Condition: Scattered / 4200 ft AGL 
Wind Speed/Gusts, Direction: 19 knots / 30 knots, 320°
Lowest Ceiling: Overcast / 5000 ft AGL 
Visibility: 10 miles
Altimeter Setting: 30.06 inches Hg
Type of Flight Plan Filed:
Departure Point: Caldwell, ID (KEUL) 
Destination: Horseshoe Bend, ID

Wreckage and Impact Information

Crew Injuries: 1 Serious
Aircraft Damage: Substantial
Passenger Injuries: 1 Minor
Aircraft Fire: None
Ground Injuries: 
Aircraft Explosion: None
Total Injuries: 1 Serious, 1 Minor 
Latitude, Longitude: 44.00019,-116.13546 (est)

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