The emotional final weeks of a family involved in Monday morning’s tragic Chambers Flat plane crash have been revealed.

Ian Campbell, 56, and his daughter Hannah, 23, were pronounced dead at the scene of the crash in a paddock on Musch Road, Stockleigh, south of Brisbane.

The Campbell family are heavily involved in the farming industry of South Burnett, having been in the area for more than 100 years.

Ian and his wife Jane founded dairy company Barambah Organics in 2002 before recently founding sustainable olive oil, grass-fed beef and lamb farm Mañana Pastoral.

The family have been ambassadors for the Royal Flying Doctor Service for many years, contributing to yearly fundraising efforts that support the rural health service.

On August 22, just weeks before their deaths, Ian and Hannah Campbell participated in a fundraising event at Archerfield Airport, the same airfield they were last seen alive at on Monday morning.

Last week they returned from a trip to Papua New Guinea where they completed the Kokoda Trail expedition to raise funds for the RFDS.

In a social media post made on June 25, the family said their reason for embarking on the life-changing expedition was to raise awareness of tragic accidents in the agricultural industry.

“When we owned and operated Barambah Organics Dairy, Ian was kicked in the neck by a dairy cow, which fractured a bone,” the post reads.

“He was alone, so he drove himself to hospital in Goondiwindi. I know, such a wild thing to do. He was lucky to have access to excellent healthcare, to insert a titanium disc in his neck.”

The post acknowledges other families in the agriculture industry who have suffered from tragic accidents.

The Campbell’s story was featured in local newspaper Maranoa Today on July 3, sharing Ian and Jane’s love of flying and journey towards advocacy for the rural healthcare cause.

Heartbreaking final posts on Hannah Campbell’s social media show her time in Papua New Guinea with her parents.

The 23-year-old’s digital footprint outlines her adventurous spirit, showcasing her international travels, sky-diving trips and farming life.

The Campbell’s fundraising page reflects their journey in Papua New Guinea as an opportunity to give back to their fellow rural Queenslanders.

“We lose far too many people in rural Queensland to accidents, suicide, and completely preventable causes,” the post reads.

“The difference between life and death should never come down to a postcode.”

Investigations are underway as to the cause of the plane crash and a preliminary report from The Australian Transport Safety Bureau is expected in about eight weeks.