A DHC-6 Twin Otter passenger plane, operated by Austin Airways, crashed near Lansdowne House Airport, ON (YLH) resulting in multiple fatalities. Two crew members and five passengers were on board, with four passengers suffering asphyxiation. The aircraft was on a domestic flight from Sandy Lake Airport, ON (ZSJ), experiencing poor visibility due to heavy snow. The pilot initiated an overshoot and then flew a second circuit without losing sight of the airfield. The aircraft turned toward the runway, and the pilot reported ‘runway in sight’ before encountering whiteout conditions and moving to advance power levers. Impact occurred with snow-covered ice, resulting in the nose gear assembly breaking off, the aircraft rotating 180 degrees counterclockwise, striking large rocks, and stopping 600 feet short of the runway. The rear spars were separated from the fuselage, fuel tanks ruptured, and the fuel lines broken. A fire erupted, and the report lacked a Probable Cause statement.A DHC-6 Twin Otter passenger plane, operated by Austin Airways, crashed near Lansdowne House Airport, ON (YLH) resulting in multiple fatalities. Two crew members and five passengers were on board, with four passengers suffering asphyxiation. The aircraft was on a domestic flight from Sandy Lake Airport, ON (ZSJ), experiencing poor visibility due to heavy snow. The pilot initiated an overshoot and then flew a second circuit without losing sight of the airfield. The aircraft turned toward the runway, and the pilot reported ‘runway in sight’ before encountering whiteout conditions and moving to advance power levers. Impact occurred with snow-covered ice, resulting in the nose gear assembly breaking off, the aircraft rotating 180 degrees counterclockwise, striking large rocks, and stopping 600 feet short of the runway. The rear spars were separated from the fuselage, fuel tanks ruptured, and the fuel lines broken. A fire erupted, and the report lacked a Probable Cause statement.