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Carbon monoxide fumes blamed for Sydney Seaplane’s fatal crash

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The pilot of a plane that plunged into a bay near Sydney killing five Britons may have had his flying ability impaired by carbon monoxide, investigators have said.

British businessman Richard Cousins, the chief executive of a FTSE 100 catering giant, died alongside his two sons, fiancee Emma Bowden and her 11-year-old daughter when a sightseeing trip on New Year’s Eve, 2017, ended in tragedy.

The de Havilland Canada DHC-2 Beaver, piloted by Canadian Gareth Morgan, who also died, plunged into water in Jerusalem Bay, 25 miles north of Sydney city centre.

Releasing an update on the investigation, the Australian Transport Safety Bureau (ATSB) said blood tests indicated the pilot and two of the passengers had elevated levels of carbon monoxide.

From left to right top: Emma Bowden, William Cousins, Richard Cousins. Bottom left to right: Heather Bowden , Edward Cousins and Pilot Gareth Morgan

The bureau’s chief commissioner Greg Hood said: “[From] consultation with medical experts, and research into the effects of carbon monoxide on aircraft operations, the ATSB considers the levels of carbon monoxide were likely to have adversely affected the pilot’s ability to control the aircraft.”

A preliminary report from 2018 said the plane hit an area of water away from the expected and standard flight path, crashing in a near-vertical position.

At the time, Aaron Shaw, chief executive of operator Sydney Seaplanes, said the aircraft “simply should not have been where it was” and that the manoeuvres prior to the crash were “inexplicable”.

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As part of the ATSB investigation, the aircraft has been examined and there have been attempts to replicate the potential source of carbon monoxide and ingress into the aircraft cabin.

They found pre-existing cracking of the engine exhaust collector-ring, which could lead to exhaust leakage into the engine bay.

Two safety notices have been issued after the ATSB and Mr Hood added: “This investigation is ongoing, and our final report, which will contain specific findings, is anticipated to be released in coming months, so we are limited in discussing specific details.

“However, if at any time during an investigation, should the ATSB identify issues that are critical to safety, we will immediately notify relevant stakeholders so proactive safety action can be taken to help prevent similar occurrences.”

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