A fly-in-fly-out worker who threatened and assaulted Qantas staff on a flight from Perth to Brisbane has been fined $25,000.

Luke MacDonald Taylor had been drinking beer and taken a Xanax before boarding QF652 in July.

When the 38-year-old was told by staff he couldn’t drink his own bourbon on-board, he skolled two drinks in front of them, then poked a female customer service manager in the shoulder, snatched her intercom handset and tried to stop her from contacting the pilot.

He also threatened to punch a male flight attendant, forcing the plane to be turned around an hour into the journey.

Luke Taylor tried to bite AFP officers as he was led off the plane. (9NEWS) (9news)

Later, he resisted arrest by Australian Federal Police by trying to bite an officer and had to be handcuffed.

Today, Taylor interrupted his sentence hearing to tell the judge that although some people find him physically intimidating, by nature he’s a really nice guy.

He blamed a combination of stress and the medication he’d taken.

The FIFO worker has since been banned from flying with Qantas.