BELL UH1B
Williams, CA — June 21, 2017
Event Information
| Date | June 21, 2017 |
| Event Type | ACC |
| NTSB Number | GAA17CA355 |
| Event ID | 20170621X41911 |
| Location | Williams, CA |
| Country | USA |
| Coordinates | 39.20167, -122.15334 |
| Highest Injury | NONE |
Aircraft
| Make | BELL |
| Model | UH1B |
| Category | HELI |
| FAR Part | 137 |
| Aircraft Damage | SUBS |
Conditions
| Light Condition | DAYL |
| Weather | VMC |
Injuries
| Fatal | 0 |
| Serious | 0 |
| Minor | 0 |
| None | 1 |
| Total Injured | 0 |
Event Location
Probable Cause
The pilot’s failure to maintain clearance from transmission wires while maneuvering at a low altitude during an agricultural application flight.
Full Narrative
The helicopter pilot reported that, while maneuvering at a low altitude during an aerial application flight, he "forgot to duck" for some nearby transmission wires. The tail rotor struck the transmission wires and the helicopter impacted terrain.
The helicopter sustained substantial damage to the tailboom.
The pilot reported that there were no preaccident mechanical failures or malfunctions with the helicopter that would have precluded normal operation.
About This NTSB Record
This aviation event was investigated by the National Transportation Safety Board (NTSB). NTSB investigates all U.S. civil aviation accidents to determine probable cause and issue safety recommendations to prevent future accidents.