original_query: What was the cause of the accident involving Airlines PNG Flight 4684?
query: What was the cause of the accident involving Airlines PNG Flight 4684?
answer: The Accident Investigation Commission (AIC) determined the cause of the crash to be pilot error. The plane deviated from its flight path, and poor visibility due to clouds obscured visual references, leading to a lack of awareness of proximity to the ground.  This was classified as controlled flight into terrain (CFIT).