Helicopter collision with transmission wires during cattle herding

Casualties unknown • Folsom, CA, US

A helicopter collided with electrical transmission wires during a cattle herding operation, resulting in an uncontrolled descent and ground impact.

What happened

A pilot and a passenger departed from a private helipad located at the pilot's residence to conduct an airborne cattle herding operation. After dropping the passenger off at the designated location, the pilot attempted to use the helicopter to divert cattle.

The pilot, who had operated in the area for approximately 24 years and was familiar with local electrical transmission lines, noted that weather conditions on the day of the accident were overcast. According to the pilot and a witness, the gray sky caused the wires to blend into the background, making them difficult to discern.

In an effort to maneuver and "cut off" a stray cow, the pilot ascended to an altitude above the transmission lines to plan a descent path. During this descent, the pilot encountered the wires unexpectedly at a distance of approximately 40 feet. The aircraft collided with two transmission wires at an altitude of about 80 feet above the ground, leading to an uncontrolled descent and subsequent impact with the ground.

Probable cause

The pilot's failure to maintain adequate clearance from electrical transmission wires during a descent maneuver in overcast conditions.

Frequently asked questions

What happened in the 1993-01-02 Hughes 269C accident near Folsom, CA?

A helicopter collided with electrical transmission wires during a cattle herding operation, resulting in an uncontrolled descent and ground impact.

What aircraft was involved and where did it happen?

The accident on 1993-01-02 involved a Hughes 269C, registration N7462F, operated by Stanley L. Van Vleck, at Folsom, CA.

What was the probable cause of the accident?

The pilot's failure to maintain adequate clearance from electrical transmission wires during a descent maneuver in overcast conditions.

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20001211X11711. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.

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