Report on vintage air plane crash that killed six released

AGL rescue crew at the scene of the plane wreckage near Imbil. There were no survivors.
AGL rescue crew at the scene of the plane wreckage near Imbil. There were no survivors. Channel 9/Twitter

THE pain of losing six people in an horrific plane crash in the Sunshine Coast hinterland will never ease for their family and friends.

But today, loved ones may at least feel a sense of closure when the Australian Transport and Safety Bureau releases its final report into why a vintage 1934 de Havilland DH84 Dragon bi-plane crashed into a steep, densely wooded ridge about 15km west of Imbil.

Pilot Des Porter, his wife Kath and their long-time friends Les and Janice D'evlin and John and Carol Dawson were killed when the plane went down on October 1 last year.

The plane was returning to Caboolture after the group raised money for charity by giving joy flights at the Monto Fly-In aircraft show.

Rescuers searched for two days in difficult conditions for the wreckage.

Des Porter with the restored bi-plane which was used in the 1930s by the Royal Flying Doctor Service, it is one of only four in the world. Photo: Nicola Brander / Caboolture News.
Des Porter with the restored bi-plane which was used in the 1930s by the Royal Flying Doctor Service, it is one of only four in the world. Photo: Nicola Brander / Caboolture News. Nicola Brander

The final report, released publicly online today, outlined how at 1.15pm, the pilot radioed air traffic control (ATC) and requested navigation assistance, advising that the aircraft was in cloud.

"Over the next 50 minutes ATC provided assistance to the pilot and a search and rescue (SAR) helicopter was dispatched to the area.

"From the pilot's radio calls it was apparent that he was unable to navigate clear of the cloud.

"Radio contact was intermittent and no transmissions from the aircraft were received after 1405.

"An extensive search was initiated, and the aircraft wreckage was located on 3 October in high terrain.

"The aircraft was destroyed and there were no survivors.''


No Caption
No Caption Terry Magee


What the ATSB found

With no or limited visual references available in and near cloud, it would have been very difficult for the pilot to maintain control of the aircraft.

After maintaining control in such conditions for about an hour, and being unable to navigate away from the mountain range, the pilot most likely became spatially disoriented and lost control of the aircraft before it impacted the ground.

Due to the limited radio and radar coverage in the area, the ability of ATC and the SAR helicopter to assist was limited.

However, the ATSB found that there were areas of potential improvement in the management of in-flight emergencies and coordination between ATC and SAR aircraft.


The wreckage of the bi-plane which crashed near Gympie on October 1. Source: ATSB
The wreckage of the bi-plane which crashed near Gympie on October 1. Source: ATSB


What's been done as a result

Airservices Australia and the Australian Maritime Safety Authority agreed to conduct a comprehensive review of their existing memorandum of understanding to ensure the effectiveness of collaborative in-flight emergency responses.

The review is anticipated to be completed by the first quarter of 2014.

Safety message

Though it remains unclear precisely how the aircraft came to be in instrument conditions, this accident highlights the importance of pre- and in-flight planning and decision-making in limiting exposure to risk.

It is important for pilots to incorporate approved weather forecasts, knowledge of the terrain, and diversion options into their flight planning, to plan for contingencies prior to and throughout a flight, and to carry out those plans well before encountering difficulty.

A preliminary investigation detailing the flight history, weather forecast, witness reports and aircraft information was released in November last year.

That report indicated weather and dense cloud coverage had played a factor in the crash.

It said there were no indications of an aircraft malfunction.

Crash worst in history of Caboolture club

Caboolture Aero Dynamic Flight Academy managing director Bryan Carpenter, a close friend of Mr Porter, said the crash had been the worst in the history of the Caboolture airfield.

He said the report should give everyone the firm answers they were looking for.

"I know this will bring some closure for the family," he said.

Gympie Times

Topics:  des porter fatality mary valley plane

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