20121019024449I

Aircraft landed at the scene of a motor vehicle crash involving two tour buses, resulting in multiple casualties. Aircraft was the last of multiple EMS helicopters dispatched to the scene. Aircraft landed on the northbound shoulder of us highway 93 (milepost 20), on a portion of roadway which had been closed to vehicular traffic. Aircraft was facing in a southerly direction. After landing and shutting down, the crew of the aircraft were advised by onscene commanders that they would not be needed for patient transport. The crew waited for other EMS helicopters which were carrying patients to depart, prior to starting thier aircraft. Prior to boarding the aircraft, a medical crewmember from the aircraft had requested that the roadway be kept closed until they departed. As the pilot was starting the aircraft and was nearly ready for takeoff, he noticed that vehicular traffic had been released and vehicles were driving in the inside (west) lane of the highway. The aircraft rotor blades were very close to the eastern centerline of the inside lane. Within a few vehicles passing by the aircraft, a rental type moving truck collided with the turning rotor blades of the aircraft. The pilot shut down the aircraft and the medical crew checked on the occupants of the truck determining that nobody had been injured in the event. Upon shutdown, the pilot discovered damage to all three blade tips. The aircraft was removed from the scene by ground transport. It appears that the damage to the aircraft is limited to the rotor blades and a final determination is being made ,by the manufacture, as to the extent of the blade damage.