Heurt d'une corde de sauvetage avec le rotor principal et l'empennage, atterrissage

Données préliminaires issues de la notification des autorités des Etats-Unis :

The crew was conducting an approach to the side of a mountain to pick up personnel during a high altitude rescue. During the approach to landing, a rescue rope came in contact with the main rotor blades. Substantial damage to the main rotor system, tail boom, and empennage.