What happened
The flight concluded with a landing on water characterized by rough seas. Following this approach and touchdown near Port Stephens, the aircraft became unstable or took on water, leading to its submersion. The plane subsequently sank and was declared lost. Despite the total loss of the airframe, all persons on board survived the incident without any reported deaths.
Findings
The primary factor contributing to the accident was the environmental condition of the sea state at the time of landing. The roughness of the water prevented the aircraft from maintaining stability or buoyancy after touchdown, resulting in the immediate sinking of the vehicle.