Cairns man Noel Marama, 26, was on a Jetstar plane from Brisbane when he started to get impatient about the time it was taking to disembark at Cairns airport, The Cairns Post reports.

He became aggressive and said to nearby passengers "there is a bomb on the plane".

Mr Marama pleaded guilty to the federal charge of making a threat and false statement.

Commonwealth prosecutor Greg Williams said a Jetstar employee was approached by six passengers concerned about Marama's behaviour.

Mr Williams said Federal Police interviewed the defendant at the airport and he admitted the allegations against him were true.

"I just said that there was a bomb on the plane," Marama told police, according to Mr Williams.

"I said about the bomb to make them get off faster."

Defence solicitor Richard O'Shane said Marama's statement was intended as a joke.

"He simply said those words to get the passengers to move a little quicker," he said.

Magistrate Allan Comans said Marama's actions were "completely irresponsible".

"People panic, and they panic for good reason in this day and age," he said.

He fined the defendant $4000 and recorded a conviction.

Source: News.com.au