Sarah Maria Beach, 45, an American expat living in London, faces misdemeanor assault charges which were filed in US district court in Utah on Thursday

A rowdy passenger aboard a Delta Airlines flight from London to Salt Lake City has been arrested for allegedly assaulting a US Air Marshal and throwing coffee on passengers.

Sarah Maria Beach, 45, an American expat living in London, faces misdemeanor assault charges which were filed in US district court in Utah on Thursday.

News of Beach’s arrest was reported by KSL.com.

Prosecutors have alleged that Beach threw coffee on passengers during the flight, overturned a drink cart, and ran up and down the aisle of the plane.

Flight attendants asked air marshals who were sitting in the back of the plane to help subdue Beach, according to the criminal complaint.

After Beach calmed down, she was seated next to one of the air marshals, who escorted her to the bathroom three times.

After she came out the third time, she allegedly jumped on the air marshal’s back and grabbed his head, neck, and jaw.

Beach allegedly behaved rowdily while on a Delta Airlines flight from London to Salt Lake City. Delta planes are seen at Salt Lake City International Airport in this 2015 stock image

Another air marshal came to his colleague’s aid and pulled Beach off of her, the government alleges.

Beach was then handcuffed for the remainder of the flight.

Her first scheduled court appearance before a federal magistrate judge was scheduled for Friday in Salt Lake City.

If convicted, Beach faces up to a year in federal prison.