Qualla: Airlines PNG Flight 4684

Airlines PNG Flight 4684: Introduction

Thu, 16 Apr 2026 00:00:00 GMT

Photo credit Arthur Chapman, CC BY 2.0. The last words the tower heard from Flight 4684 were not a mayday. They were a farewell in Tok Pisin: "Thank you very much, morning long you." The crew had just finished a routine exchange with another Twin Otter climbing out of Kokoda, and they were minutes from landing themselves. No alarms, no anomalies, just the usual crosstalk between two small aircraft threading the same narrow gap in the Owen Stanley Range. Then silence. On 11 August 2009, somewhere in the cloud wrapped around a ridge eleven kilometres southeast of Kokoda airstrip, the thirteen people aboard flew an otherwise airworthy aeroplane straight into a mountain they never saw.

Read more: Airlines PNG Flight 4684 on Qualla

Image: Arthur Chapman | CC BY 2.0

Airlines PNG Flight 4684: The Gap That Won't Forgive

Thu, 16 Apr 2026 00:00:00 GMT

Photo credit Arthur Chapman, CC BY 2.0. The Kokoda Gap is not really a gap. It is a dip in the Owen Stanleys, roughly eleven kilometres wide, low enough for small piston and turboprop aircraft to pass through on visual rules and punch down into the Yodda Valley toward Kokoda's short grass strip. On a clear morning, pil...

Read more: Airlines PNG Flight 4684 on Qualla

Image: Arthur Chapman | CC BY 2.0

Airlines PNG Flight 4684: Two Pilots, One Instrument Rating

Thu, 16 Apr 2026 00:00:00 GMT

Photo credit Arthur Chapman, CC BY 2.0. Investigators later pieced together the flight's last minutes from a small GPS tracker carried aboard the aircraft. Twin Otters are not required to carry a cockpit voice recorder or a flight data recorder, so the telemetry device became the only witness. What it showed, combined ...

Read more: Airlines PNG Flight 4684 on Qualla

Image: Arthur Chapman | CC BY 2.0

Airlines PNG Flight 4684: A Heart That Nobody Knew About

Thu, 16 Apr 2026 00:00:00 GMT

Photo credit Arthur Chapman, CC BY 2.0. The investigation took an unexpected turn when pathologists examined First Officer Souka. His postmortem revealed critical coronary artery disease, severe enough that the examining doctor said a medical emergency could have occurred at any time. Souka's own family had known nothi...

Read more: Airlines PNG Flight 4684 on Qualla

Image: Arthur Chapman | CC BY 2.0

Airlines PNG Flight 4684: Twelve Passengers, One Captain, One Co-Pilot

Thu, 16 Apr 2026 00:00:00 GMT

Photo credit W. Chapman from Australia, CC BY 2.0. The thirteen people aboard were not abstractions. Among them was Matthew Leonard, a part-time tour guide and the son of a Western Australian police inspector, on his way to meet trekkers starting the Kokoda Track. Several Victorians and Queenslanders had booked the flight for the...

Read more: Airlines PNG Flight 4684 on Qualla

Image: W. Chapman from Australia | CC BY 2.0

Airlines PNG Flight 4684: What the Wreckage Changed

Thu, 16 Apr 2026 00:00:00 GMT

Photo credit Arthur Chapman, CC BY 2.0. Kokoda Airport in 2009 had no ground-based navigation aids of its own. Pilots approaching the strip relied either on GPS, which both crew had apparently used without formal approach-procedures training, or on the distance-measuring equipment at Girua Airport near Popondetta, well...

Read more: Airlines PNG Flight 4684 on Qualla

Image: Arthur Chapman | CC BY 2.0