The cost of diverting a transatlantic flight due to the alleged threatening behaviour of a passenger who repeatedly demanded nuts could be €490,000, a court has heard.

The United Airlines plane was en route from Rome to Chicago when the captain made the decision to touch down at Belfast International Airport after concerns were raised about the man by cabin crew and other passengers.

A district judge in Northern Ireland was told the plane had to dump 50,000 litres of fuel before making the unscheduled stop.

As the crew would have exceeded their legal flying hours if the aircraft had recommenced the journey straight away, 282 passengers were forced to wait almost 24 hours before it could take off again, with many having to sleep on the terminal floors.

Jeremiah Mathis Thede, from California, appeared at Coleraine Magistrates’ Court last week charged with endangering the safety of the aircraft, disruptive behaviour on board and committing common assault.

The judge was told the 42-year-old joint US and Italian citizen denies the offences and claims there was a “conspiracy” against him.

A constable with the Belfast International Airport Constabulary told the court the incident unfolded when the accused allegedly got up 15 minutes after take-off from Rome, when the seatbelt lights were still illuminated, and demanded “nuts or crackers”.

He claimed Thede, from The Alameda in Berkeley, California, refused to sit back down again until he obtained a snack.

The officer said a member of crew managed to “appease” the passenger by giving him some nuts and Thede then retook his seat. But 10 minutes later he got up and demanded more nuts and crackers, the officer told judge Christopher Holmes.

He said crew members then advised the passenger he would only get another snack if there were some left over after packets had been given to other travellers.

Other passengers claimed Thede kept getting up, opening the overhead baggage lockers, blocking the aisles and kept going to the toilets

The officer said Thede allegedly replied: “I can have as much nuts and crackers as I f****** want.”

Thede is accused of common assault on an air stewardess.

After these incidents, crew alerted the captain about Thede’s alleged conduct. The constable said fellow passengers had also raised concerns about his behaviour, claiming he kept getting up and down from his seat, repeatedly opened the overhead baggage lockers, blocked the aisles and made numerous trips to the toilets.

The court heard that the captain asked for a number of men to sit around the passenger in case he became violent.

However, the constable acknowledged that “no one was struck” during the flight.

The officer said concerns about Thede’s “erratic” behaviour prompted the captain to decide to land at Aldergrove, which is near Lough Neagh, around 20 miles from Belfast city centre. The flight had already passed over Scotland and had started flying across the Atlantic when it turned round.

“The captain dumped 50,000 litres of fuel before he landed safely at the International Airport,” said the officer.

Asked by a prosecution barrister to assess the cost of the redirection, the constable replied:“It would be upwards of £300,000 to £350,000.

“There is compensation for passengers. There were 269 passengers lying sleeping on the floor of the terminal because there were no hotel rooms found for them.”

Thede, with tightly cropped hair and wearing a plain grey fleece tracksuit top and bottoms, looked on impassively from the dock as the policeman outlined the financial consequences of the unplanned landing in Belfast.

The officer told the judge that as he was escorting Thede from the plane he allegedly made a rude hand gesture to one female passenger who was taking a picture.

The constable said during a police interview Thede denied committing any offences: “He said it wasn't him, there was a conspiracy theory against him.”

Applying for bail, Thede’s lawyer said his client insisted the cabin crew and pilot had “over-reacted”.

The solicitor said alcohol was not a factor as a police doctor had examined him upon arrest and deemed him “fit to be interviewed”.

“His position is he’s done nothing wrong and effectively this is an over-reaction by staff in the plane, those in charge,” said the lawyer.

The judge said it was too early to consider a bail application as a number of background checks on the Thede had to be carried out with the authorities in the US.

Thede was remanded in custody to appear before Antrim Magistrates’ Court via video-link on Tuesday.

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