No fatalities

Helicopter Strikes Transmission Wires During Low-Altitude Maneuvering

Williams, CA, United States

On June 21, 2017, a BELL UH1B operated by JONES AVIATION INC was involved in an aviation accident near Williams, CA. No fatalities were reported. Investigators recorded the probable cause as: The pilot forgot to duck for nearby transmission wires. This summary draws on records from NTSB; 5 related events involving the same aircraft type or operator are linked below.

SourcesNTSBPrimary reportUpdated 2026-08-03Data APIEditorial standards

A helicopter conducting an aerial application flight struck transmission wires with its tail rotor after the pilot reported forgetting to avoid them, resulting in an impact with terrain and substantial damage.

Incident Overview

A helicopter pilot reported that, while maneuvering at low altitude during an aerial application flight, he "forgot to duck" for some nearby transmission wires. The tail rotor subsequently struck the transmission wires, and the helicopter impacted terrain.

Damage Assessment

The helicopter sustained substantial damage to the tailboom as a result of the impact with terrain.

Pilot Statement

The pilot stated that there were no preaccident mechanical failures or malfunctions with the helicopter that would have precluded normal operation. The incident was attributed to the pilot's failure to maintain clearance from the transmission wires while maneuvering at low altitude.

Probable cause

The pilot forgot to duck for nearby transmission wires.

Contributing factors

PilotEffect on operation