PMT Air flight 241 departed the Angkor temple town of Siem Reap (REP) at around 10:00. The Antonov 24 carried out a scheduled flight to Sihanoukville (KOS). The airplane flew into the side of Phnom Damrey Mountain at a height of 2700 feet. CONCLUSIONS: The accident was caused by the combination of the following adverse factors: 1- In bad weather conditions, the flight crew was carried out beyond the assigned flight track to a mountainous area without awareness of its exact position and of high terrain. 2- VMC (Visual Meteorological Condition) descent continued under improper weather conditions. 3- Poor management of the company. Contributing factors: – No clear information available to Sihanouk Ville Control Tower of the exact position of the aircraft. – No evidence provided of recent proficiency check or CRM training of the crew.