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NTSB Preliminary Report: Mammoth Cave, KY

Location:

Mammoth Cave, KY

Accident Number:

ERA22FA397

Date & Time:

September 3, 2022, 17:40 Local

Registration:

N162NH

Aircraft:

HISSERICH NICHOLAS S JETEXEC

Injuries:

1 Fatal

 

Flight Conducted Under: Part 91: General aviation - Personal

On September 3, 2022, about 1740 central daylight time, an experimental, amateur built Rotorcraft JetExec helicopter, N162NH, was destroyed when it was involved in an accident near Arthur, Kentucky. The pilot was fatally injured. The helicopter was operated as a Title 14 Code of Federal Regulations Part 91 personal flight.

The helicopter was recently purchased in St. Louis, Missouri by the owner, who asked a friend to fly it on a multi-leg flight to Knoxville, Tennessee, where it would be based. The third leg of the trip was intended to depart Sturgis Municipal Airport (TWT), Sturgis, Kentucky, for Glasgow Municipal Airport (GLW), Glasgow, Kentucky. Several witnesses at TWT stated that they were aware of “stormy” weather in the surrounding area, and they tried to convince the pilot to wait a day or two for the weather to improve. The pilot did not want to wait and departed for GLW with his wife. About 30 minutes later, the pilot returned to the departure airport, dropped off his wife and subsequently departed again. The pilot’s wife flew home in a private airplane and when her husband did not arrive later that evening, she reported him missing. The wreckage was subsequently located in the Mammoth Cave National State Park on September 5th.

The accident site was located in heavily wooded, steep terrain. The airframe came to rest on its left side oriented on a heading of about 45° magnetic. The cabin, instrument panel, seats, and engine compartment were all fractured in several pieces. The tail boom remained attached to the fuselage but was heavy damaged from impact forces. The tail rotor was wedged between two trees and both tail rotor blades were fractured off and located near the front of the helicopter. The engine was impact separated from the gearbox. The engine exhibited evidence of tortional twisting. The engine rotated freely. The main rotor gearbox rotated freely. A borescope was used to inspect the combustion and turbine blades. No anomalies were noted with the engine.

The helicopter was recovered and retained for further examination.

Aircraft and Owner/Operator Information

Aircraft Make:

HISSERICH NICHOLAS S

Registration:

N162NH

Model/Series:

JETEXEC

Aircraft Category:

Helicopter

Amateur Built:

Yes

 

 

Operator:

On file

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:

KGLW,716 ft msl

 

Observation Time:

17:35 Local

Distance from Accident Site:

13 Nautical Miles

 

Temperature/Dew Point:

22°C /22°C

Lowest Cloud Condition:

Scattered

 

Wind Speed/Gusts, Direction:

6 knots / , 280°

Lowest Ceiling:

Overcast / 9000 ft

AGL

Visibility:

7 miles

Altimeter Setting:

30.08 inches Hg

 

Type of Flight Plan Filed:

VFR

Departure Point:

Sturgis, KY (TWT)

 

Destination:

Glasgow, KY (GLW)

Wreckage and Impact Information

Crew Injuries:

1

Fatal

Aircraft Damage:

Destroyed

Passenger Injuries:

N/A

Aircraft Fire:

None

Ground Injuries:

N/A

Aircraft Explosion:

None

Total Injuries:

1

Fatal

Latitude, Longitude:

37.175949,-86.15031

(est)

Investigator In Charge (IIC):  Boggs, Daniel

Additional Participating Persons:  Sean Smith; FAA; Louisville, KY

Administrative Information

Note:

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