Casualties unknown

Helicopter Strikes Power Line During Precautionary Landing Due to Thunderstorms (N8329B)

Cassville, MO, US

On July 2, 1998, a Robinson R-44 (registration N8329B) was involved in an aviation accident near Cassville, MO. Investigators recorded the probable cause as: The pilot in command's inadequate preflight planning/preparation and weather evaluation that resulted in flight into adverse weather conditions. Factors to the accident were a preflight briefing service not being used and the transmission 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
Aircraft registered N8329B
Aircraft registered N8329B. Photo: Alan Wilson from Stilton, Peterborough, Cambs, UK / CC BY-SA 2.0, via Wikimedia Commons

A pilot and passenger encountered thunderstorms en route, prompting a precautionary landing. During approach, the helicopter struck a power line and executed a run-on landing, resulting in substantial damage to skids, rotor blades, and tail boom.

Incident Details

A pilot and a passenger were en route to their destination when they became aware of a line of thunderstorms approaching from behind. The pilot decided to make a precautionary landing due to the convective weather in the area, intending to wait for the line of storms to move further from their route. During the approach to the landing area, the aircraft struck a power line approximately 35 feet above ground level (AGL). The pilot then executed a run-on landing, during which the aircraft impacted the ground, resulting in substantial damage to the landing skids, rotor blades, and tail boom.

Pilot Statement

The pilot stated that he had been aware of the thunderstorms from watching a television weather broadcast but thought the line of storms had moved past his route of flight when he departed. He reported that there were no Flight Service Station (FSS) or Direct User Access Terminal System (DUATS) pilot briefings given for the aircraft in question. Additionally, the pilot stated that there were no aircraft mechanical problems related to the accident.

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Frequently asked questions

What happened in the 2 Jul 1998 Robinson R-44 accident near Cassville, MO?

A pilot and passenger encountered thunderstorms en route, prompting a precautionary landing. During approach, the helicopter struck a power line and executed a run-on landing, resulting in substantial damage to skids, rotor blades, and tail boom.

What aircraft was involved and where did it happen?

The accident on 2 Jul 1998 involved a Robinson R-44, registration N8329B, at Cassville, MO.

What was the probable cause of the accident?

The pilot in command's inadequate preflight planning/preparation and weather evaluation that resulted in flight into adverse weather conditions. Factors to the accident were a preflight briefing service not being used and the transmission wire.

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20001211X10493. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.