Various parties have speculated on different possible causes, including engine stoppage and hijacking. Others have even suggested that the plane was victim of an artillery shot fired during recent military exercises. However, on the day of the crash the military called off area exercises due to rain, ruling out this last possibility. But until the aircraft's black box is recovered, there is no way of really knowing what happened.
各方揣測的失事原因包括螺旋槳引擎停止運轉、劫機，甚至是遭軍方演習的砲彈擊落，其中軍方由於在失事當天因雨取消演習，而被排除與事件有關，但在黑盒子未尋獲之前，確實失事原因尚無法得知。