A Britten-Norman BN-2B-27 Islander, CC-CYR crashed in a residential area of Puerto Montt, Chile, and burst into flames. At 10:50 local time, the flight took off from runway 01 at Puerto Montt-Marcel Marchant Airport. Approximately 36 seconds after takeoff, the pilot in command radioed that he was returning to the airport, without declaring an emergency or stating the reason for the return. The aircraft made a left turn, lost altitude, until impacting against a house, 400 m west of the runway. All six on board were killed and one person on the sidewalk was injured. Investigators found no component failures in the engines. Yet witnesses reported that one or both engines had an abnormal sound during takeoff, with loss of power. The aircraft had difficulty in maintaining the climb attitude. During the previous flights, fuel was used from the wing tip fuel tanks, with very little fuel remaining after the last flight. The pilot ordered the aircraft to be refueled in the main tanks, not the tip tanks. It was considered possible that the pilot had left the fuel selectors to the tip tanks during departure. The final report did not contain a Probable Cause statement.