CHI99LA026

NTSB accident investigation · Tomschin Mini 500 · Clinton, MN · November 6, 1998

Accident · No injuriesLimited investigationFinal report
Date
November 6, 1998, 09:00 local (15:00 UTC)
Place
Clinton, MN
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Enroute
Aircraft
N316AZTomschin Mini 500
Weather
Visual (VMC) · Day
Status
Completed · report February 16, 2001
Report
Approved by Office Director
FAA report
19981106031829A
Case key
45272

From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.

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Probable cause

the non-pilot's failure to maintain clearance from the power lines. Factors contributing to this accident were the non-pilot's lack of total experience and the power lines.

Sequence of events

NTSB’s coding before 2008: each occurrence and phase of flight, and the causes and factors under it. The codes are defined in NTSB’s coding manual.

In flight collision with objectCruise
Clearance - not maintainedUnqualified personCause
Lack of experienceUnqualified personFactor
Object - wire,transmissionFactor
In flight collision with terrain/waterDescent - uncontrolled

Analysis

The individual who piloted the helicopter said that he was flying the helicopter and everything was working fine. As he looked inside at one of the gauges, he felt a strong tug on the helicopter. The non-pilot said that he knew right away that he had hit some high wires. He tried to keep the helicopter from crashing. The non-pilot said that he felt the wires break and he landed the helicopter the best that he could. It landed upright on the skids. Examination of the wreckage revealed no anomalies. The non-pilot did not possess a pilot certificate or a current medical certificate. A review of his pilot logbook showed that he had 23 total flying hours in helicopters.

Factual narrative

On November 6, 1998, at 0900 central standard time (cst), a Tomschin Mini 500, N316AZ, piloted by a non-certificated individual, sustained substantial damage when while in cruise flight, the helicopter struck a power line. The helicopter subsequently impacted into a farm field, 4 miles east of Clinton, Minnesota. Visual meteorological conditions prevailed at the time of the accident. The personal flight was being conducted under 14 CFR Part 91. No flight plan was on file. The individual operating the helicopter at the time of the accident reported no injuries.

At 0910 cst, the Big Stone County, Minnesota, Sheriff's Department received a telephone call from a farmer who said that a small red helicopter had hit some electric wires 5 miles east of Clinton, Minnesota along Big Stone County Road 6. The Sheriff responded to the scene and found the helicopter resting upright in a farm field just north of the road. The individual who had piloted the helicopter was not at the scene when the Sheriff arrived. Shortly after the Sheriff arrived, the non-pilot returned to the scene with a flat bed truck. The Sheriff assisted the non-pilot with loading the helicopter wreckage on to the truck. The non-pilot told the Sheriff that he was okay.

When interviewed by a Big Stone County, Minnesota, Sheriff's Deputy, the individual who piloted the helicopter said that he was flying the helicopter and everything was working fine. As he looked inside at one of the gauges, he felt a strong tug on the helicopter. The non-pilot said that he knew right away that he had hit some high wires. He tried to keep the helicopter from crashing. The non-pilot said that he felt the wires break and he landed the helicopter the best that he could. It landed upright on the skids.

A Federal Aviation Administration (FAA) inspector examined the helicopter wreckage at the residence of the non-pilot. The helicopter's tail boom was broken off just behind the engine compartment. Both forward and rear cross-tubes to the skids were bent upward. The engine mounts were bent upward. Both main rotor blades were broken in several places. Flight control continuity was confirmed. Examination of the engine, engine controls and other helicopter systems revealed no anomalies.

The non-pilot told the FAA inspector that he did not possess a pilot certificate or a current medical certificate. The non- pilot said that he had taken several lessons in Alabama. A review of his pilot logbook showed that the non-pilot had 23 total hours of flight time in helicopters.

Aircraft

Registration
N316AZ
Reported as
Tomschin Mini 500
Category
Helicopter, amateur-built
Serial number
0456
Airframe hours
23
Engine
Rotax 582, 67 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Registered owner
Douglas J. & Amanda Tomschin
Airworthiness certificate
Special, Experimental (Special)
Last inspection
AAIP · November 7, 1998

Matched to the registry by N-number and the event date; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.

Flight crew

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Medical
Unknown, Unknown
Seat
Front
Flight hours
53 total · 23 in this make and model · 1 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Visibility
10 statute miles
Lowest ceiling
2,000 ft overcast
Temperature
37 °F, dew point 43 °F
Altimeter
30.00 inHg
Observed at
MOX, 16 nm away

FAA reports on this event · 1

The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.