A DHC-6 Twin Otter aircraft crashed into a steep snow- and ice-covered mountain slope in the Queen Alexandra range of Antarctica during a VFR repositioning flight from the Adeneus-Scott Station to the Zucchelli Station at Terra Nova Bay. All three crew members were killed. The aircraft’s climb performance was insufficient to avoid the terrain, and a terrain warning was received 45 seconds prior to impact. Search and rescue operations were conducted late at night on January 25, revealing potential contributing factors related to the aircraft’s turn prior to reaching the Ross Shelf, which may have led to exposure to cloud cover obscuring the view of Mount Elizabeth.A DHC-6 Twin Otter aircraft crashed into a steep snow- and ice-covered mountain slope in the Queen Alexandra range of Antarctica during a VFR repositioning flight from the Adeneus-Scott Station to the Zucchelli Station at Terra Nova Bay. All three crew members were killed. The aircraft’s climb performance was insufficient to avoid the terrain, and a terrain warning was received 45 seconds prior to impact. Search and rescue operations were conducted late at night on January 25, revealing potential contributing factors related to the aircraft’s turn prior to reaching the Ross Shelf, which may have led to exposure to cloud cover obscuring the view of Mount Elizabeth.