Prosecutors Monday sought a three-year jail term for a former Korean Air executive in the latest development in the "nut rage" case.

They demanded that Cho Hyun-ah, former Korean Air Lines vice president and the daughter of the company's CEO, serve the jail term during an appellate court hearing here.

A lower court in February convicted her of endangering flight safety after she forced the chief steward off a taxiing flight in New York because of the way she was served nuts -- in an unopened bag instead of on a plate.

At the time, the court sentenced her to a year in prison, saying her actions changed the planned route of the flight and threatened the safety of passengers.

Cho's lawyers have insisted she barely caused the aircraft's flight plan to be changed because it moved less than 20 meters to drop off the head of the cabin crew at the airport gate. (Yonhap)