Accident Overview
A commercial certificated helicopter pilot was conducting a Part 135 on-demand air taxi flight, transporting an external sling load and a passenger from a remote off-airport site. The pilot reported that after lifting a relatively light load on a short sling line, the helicopter transitioned to cruise flight.
Sequence of Events
Shortly after entering cruise flight, the pilot inadvertently allowed the cargo and sling line to strike the tail rotor blades. The impact disabled the tail rotor, and the pilot was unable to maintain control of the helicopter. During the ensuing forced landing, the helicopter collided with terrain.
Pilot Statement
The pilot indicated that there were no preimpact mechanical problems with the helicopter. The accident occurred without any reported mechanical malfunctions or failures prior to the loss of control.
Conclusion
The helicopter sustained damage during the collision with terrain. The pilot's actions led to the sling load contacting the tail rotor, resulting in a loss of tail rotor effectiveness and subsequent loss of control.