Australian Associated Press reported that Jeff Hills and his son Matthew were found dead in the wreckage of their four-seater plane which crashed in steep terrain in Dorrigo National Park, near Coffs Harbour, on Saturday.
The Westpac Rescue Helicopter was called to assist the Australian Maritime Safety Authority when reports of a overdue aircraft in the Mid North Coast region were received Saturday morning, September 21.
The aircraft, a Mooney M20, had departed Murwillumbah at 6.30am Saturday and was expected to arrive at Taree by 8.30am.
The Westpac Rescue Helicopter with Critical Care Medical Team on board worked along side the Essendon based AMSA Search and Rescue Jet to conduct a search along the aircraft's likely route.
Weather conditions in the area were reported to be poor with low cloud.
The crash is being investigated by the Australian Transport Safety Bureau, which asked any witnesses to come forward.
"Should a critical safety issue be identified during the course of the investigation, the ATSB will immediately notify relevant stakeholders so appropriate and timely safety action can be taken," a spokesman told AAP.