Incident Overview
A helicopter equipped with landing skid snow pads was parked on a narrow ramp extension to a roof top helipad. The helipad was surrounded by a concrete curb. During the takeoff to a hover, the right snow pad struck bolts protruding from the top of the curb on the right side of the helicopter. The snow pad became momentarily caught on the bolts, resulting in a right rolling action of the helicopter.
Sequence of Events
The lift forces generated by the helicopter during the hover bent the snow pad, causing it to suddenly disengage from the bolts. At that moment, the aircraft accelerated toward a nearby building. The pilot attempted to regain control to avoid impact with the building. During this maneuver, the tail rotor struck the rooftop, leading to a loss of anti-torque control. The helicopter then spun to the right until it impacted on the helipad.
Aircraft and Equipment
The helicopter was equipped with landing skid snow pads. No further details about the aircraft type, registration, or operator were provided in the source.