Airlines PNG Flight 4684

Airlines PNG Flight 4684 (CG4682/TOK4684) was a scheduled domestic passenger flight operated by Papua New Guinean Airlines PNG, flying from Jacksons International Airport in Papua New Guinea's capital Port Moresby to Kokoda Airport in Oro Province, Papua New Guinea. On 11 August 2009, the aircraft operating the flight, a de Havilland Canada Twin Otter, the aircraft impacted terrain on the eastern slope of the Kokoda Gap at about 1,760 m (5,780 ft) above mean sea level in heavily-timbered jungle about 11 km south-east of Kokoda Airstrip. The aircraft was destroyed by impact forces. There were no survivors of the 13 people on board. A search and rescue operation was conducted by authorities who found the wreckage of the plane the next day, 12 August 2009. The aircraft was severely damaged, searchers found no signs of life. Papua New Guinean Search and Rescue Agency then announced that everyone on board had died.

The Accident Investigation Commission (AIC) investigated the cause of the crash and released its final report, concluding that the aircraft crashed due to pilot error. The plane deviated from its original flight path, visual references normally used in the Kokoda Gap were obscured by clouds, the pilots were not aware of their proximity to terrain. The AIC classified the accident as controlled flight into terrain.