Incident Details
Witnesses observed a helicopter flying slowly at an altitude below 100 feet above ground level (agl) from east to west along the Arkansas River. The helicopter struck power lines that spanned the river, then descended vertically and impacted a sandbar.
Witness Reports
Witnesses reported that the engine "sounded okay and it continued to run" until the helicopter made ground contact. The unmarked power lines were estimated to be 60 to 75 feet agl. After the accident, three lower wires of the power line were observed to be frayed.
Passenger Account
The passenger reported that when they saw the powerline tower supporting the cables crossing the river at the bridge on Memorial Boulevard, they discussed and decided to turn around and return to Haskell. The passenger stated he did not see the other power line that crossed the river prior to the bridge, nor did he remember striking it.
Examination Findings
Linear scratching and dull gray metal transfers were found on sections of one wooden main rotor blade's leading edge and underside. The forward portion of the center vertical console also exhibited linear scratching. Continuity was established to all flight controls.