An Aviastar Mandiri de Havilland Canada DHC-6 Twin Otter 300 turboprop plane crashed into a mountain slope during a domestic cargo flight from Dekai to Wamena. The aircraft lost contact with Wamena shortly after takeoff and was subsequently sighted after a day, landing in a remote mountain area in Tangma District, approximately 9,600 feet above sea level. The aerodrome is located near the Baliem Valley, with an airport elevation of 5085 feet, surrounded by mountains up to 12,000 feet. Navigation aids are limited to NDB ‘ZW’, and the approach procedure is not available.An Aviastar Mandiri de Havilland Canada DHC-6 Twin Otter 300 turboprop plane crashed into a mountain slope during a domestic cargo flight from Dekai to Wamena. The aircraft lost contact with Wamena shortly after takeoff and was subsequently sighted after a day, landing in a remote mountain area in Tangma District, approximately 9,600 feet above sea level. The aerodrome is located near the Baliem Valley, with an airport elevation of 5085 feet, surrounded by mountains up to 12,000 feet. Navigation aids are limited to NDB ‘ZW’, and the approach procedure is not available.