An Australian man freed from a Lebanese prison after two years in custody over a terror plot has said his first priority is convincing his own daughters that he is innocent.

Key points: Amer Khayat has two teenage daughters in Sydney

Amer Khayat has two teenage daughters in Sydney Authorities say Mr Khayat's brothers planned to blow up an Etihad flight from Sydney to Abu Dhabi and planted a bomb in his luggage

Authorities say Mr Khayat's brothers planned to blow up an Etihad flight from Sydney to Abu Dhabi and planted a bomb in his luggage Mr Khayat says he wants to return to Australia as soon as he can get enough money to pay for his flights home

Amer Khayat said he needs to repair a fractured relationship with the girls, aged 16 and 13, who live in Sydney.

"They think I'm guilty," he said.

"They don't know about the system here in Lebanon — why I was here, why I was in prison. They think that in Lebanon I did something wrong."

Authorities in Australia and Lebanon say Mr Khayat was an intended victim of his own brothers, who plotted to blow up an Etihad flight from Sydney to Abu Dhabi by planting a bomb in his luggage.

Amer Khayat had been estranged from two of his other brothers, Mahmoud and Khaled, in Sydney before they sought him out in mid-2017 and urged him to visit relatives in Beirut.

Courts in two countries have heard that Mahmoud and Khaled Khayat asked their brother to bring across gifts for family members.

Two juries in Australia have now determined that those gifts included bombs hidden in a meat grinder and a doll.

The brothers panicked and removed the explosives at check in.

The tribunal in Beirut held that Amer Khayat knew nothing of this and flew on an Etihad flight to Abu Dhabi and then on to Beirut.

The bomb plot was uncovered two weeks later, thanks in part to a tip-off from Israel, and the Sydney brothers were arrested.

Amer Khayat was detained shortly afterwards in Lebanon and even though the Australian Federal Police (AFP) said he had been duped by his brothers, who were Islamic State (IS) supporters, he was held in Roumieh prison until his release this week.

Another brother, Tarek Khayat, a 46-year-old builder from Tripoli, in Lebanon, fought for Islamic State (ISIS) in Syria before he was eventually captured by US forces.

Three Khayat brothers — Khaled, Mahmoud and Tarek — have now been convicted of terrorism offences.

Amer Khayat maintains they are innocent of the plot.

He said all the items in his luggage were his own.

"They didn't take anything out and they didn't put anything in," he said.

Amer Khayat says police in Lebanon beat him and made him sign blank papers. ( Supplied )

Mr Khayat spoke to the ABC after he was finally released from jail.

He said he was beaten by police in Lebanon and forced to sign blank papers.

"They hit me. They told me that after four hours I would be able to go home. It was 26 months before I got to go home," he said.

A signed confession was used against him in the military tribunal, but there were so many inconsistencies and errors in the documents that the judges found it was unreliable.

"The police just looked up the news on the phone and wrote it down and got me to sign it," Mr Khayat said.

He said he did not believe his brothers in Australia were extremists, and said he did not know that a brother who fought in Syria for ISIS had been sentenced to death.

Tarek Khayat is awaiting execution in Iraq.

Mr Khayat was incarcerated for just over two years. ( ABC News: Cherine Yazbeck )

"I haven't spoken to him since 2014," Amer said.

Mr Khayat said he had a troubled relationship with the Sydney brothers because of his own use of the drug ice.

He said he had sometimes not seen them for two years at a stretch.

"I was using since 2011 to 2016," he said.

"It's nearly four years [since I last] used. Ice makes me crazy sometimes."

The military tribunal in Beirut heard Amer's drug use might have been one reason why Mahmoud and Khaled may have decided his brother was expendable.

Amer with brother Fadi. Three of their other brothers have been found guilty of terrorism offences. ( ABC News: Cherine Yazbeck )

The ABC asked him if this might be a reason why his brothers had targeted him.

"They don't need drug people to come to their house," he said.

"[They said] You shouldn't be with us."

Mr Khayat said he was a religious person who had kept clear of ISIS prisoners in Beirut's Roumieh jail.

"There's lots of them there," he said.

"They're really bad to people, and to me too."

Mr Khayat said he wanted to return to Australia as soon as he could get enough money to pay for his flights home.

"Do you think the Australian embassy will help me?" he asked.

"It's a good country to live there. Even if you can't find a job. Australia is the best country in the world. I love Australia."