Casualties unknown

Helicopter Strikes Power Line During Festival Ride Operations (N9158U)

Drummond, WI, US

On September 24, 2005, a Robinson R44 (registration N9158U) was involved in an aviation accident near Drummond, WI. Investigators recorded the probable cause as: Clearance not obtained/maintained by the pilot during an unknown phase of flight. Contributing factors were the improper use of procedures by the pilot, the inadequate surveillance of the operation by company/management, and the wire. This summary draws on records from the U.S. National Transportation Safety Board (NTSB) historical archive; 5 related events involving the same aircraft type or operator are linked below.

Sourcesthe U.S. National Transportation Safety Board (NTSB) historical archivePrimary reportUpdated 2026-07-04Data APIEditorial standards

A helicopter providing rides at a festival struck a power line over a lake. Witnesses reported unusual engine sounds before the crash. Investigation found no flight control anomalies but discovered fatigue fractures in seat belt buckles.

Accident Overview

A helicopter engaged in for-hire ride operations during a festival collided with a power line suspended over a lake. The weather at the time was visual meteorological conditions. The power line was positioned at a height approximately equal to that of the surrounding trees.

Witness Accounts

One witness reported hearing the helicopter for about one minute before the crash. During that period, he heard a change in pitch, an increase in revolutions per minute, and then the sound of the impact.

Operational Concerns

According to the operator, no safety briefings were provided to ride passengers, and the helicopter was not shut down during passenger loading and unloading. A previous ride passenger stated that upon arrival on the morning of the accident, there was no designated safe area around the helicopter and no safety briefing. This passenger also noted that the engine was running when the pilot exited the helicopter to secure the passenger's seatbelts.

A written complaint had been lodged regarding the operator, alleging that the helicopter was flown in a "manner contrary to all safety guidelines outlined in the manufacturer's Safety Course and Special Federal Aviation Regulation 73.1." The company owner stated that following that complaint, they no longer offered a "wild" ride.

Inspection Findings

Examination of the helicopter's flight control and propulsion systems revealed no anomalies that would have prevented normal operation. However, inspection of the seat belt buckles showed fatigue fractures within the buckle. This issue was later addressed in a Special Airworthiness Information Bulletin and a service bulletin issued by the helicopter manufacturer.

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Frequently asked questions

What happened in the 24 Sept 2005 Robinson R44 accident near Drummond, WI?

A helicopter providing rides at a festival struck a power line over a lake. Witnesses reported unusual engine sounds before the crash. Investigation found no flight control anomalies but discovered fatigue fractures in seat belt buckles.

What aircraft was involved and where did it happen?

The accident on 24 Sept 2005 involved a Robinson R44, registration N9158U, at Drummond, WI.

What was the probable cause of the accident?

Clearance not obtained/maintained by the pilot during an unknown phase of flight. Contributing factors were the improper use of procedures by the pilot, the inadequate surveillance of the operation by company/management, and the wire.

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20051003X01564. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.