Casualties unknown

Helicopter Strikes Power Line During Aerial Application Flight (N986B)

Wheeler, WI, US

On July 26, 2001, a Bell 47G-2 (registration N986B) was involved in an aviation accident near Wheeler, WI. Investigators recorded the probable cause as: The pilot not maintaining altitude/clearance from the power transmission line. A factor to the accident was the power transmission line. This summary draws on records from the U.S. National Transportation Safety Board (NTSB) historical archive.

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

A helicopter maneuvering for an aerial application flight struck a 42-foot-high power transmission line and subsequently impacted the terrain. The tailboom assembly was found separated from the main wreckage. No pre-impact anomalies were detected.

Accident

While maneuvering during an aerial application flight, a helicopter collided with a power transmission line. The pre-impact height of the power transmission line was approximated to be 42 feet. Following the strike, the helicopter impacted the terrain.

Wreckage and Impact

The tailboom assembly, including the tail-rotor, was discovered approximately 125 feet from the main wreckage. The separation of the tail section indicates a significant impact event during the accident sequence.

Post-Accident Inspection

A thorough post-accident inspection of the helicopter was conducted. No anomalies were found that could be associated with any pre-impact condition. The inspection covered all relevant systems and components, yielding no evidence of mechanical failure or malfunction prior to the collision.

Frequently asked questions

What happened in the 26 Jul 2001 Bell 47G-2 accident near Wheeler, WI?

A helicopter maneuvering for an aerial application flight struck a 42-foot-high power transmission line and subsequently impacted the terrain. The tailboom assembly was found separated from the main wreckage. No pre-impact anomalies were detected.

What aircraft was involved and where did it happen?

The accident on 26 Jul 2001 involved a Bell 47G-2, registration N986B, at Wheeler, WI.

What was the probable cause of the accident?

The pilot not maintaining altitude/clearance from the power transmission line. A factor to the accident was the power transmission line.

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20010801X01580. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.