The former vice president of Korean Air appeared before prosecutors Wednesday to face questioning for allegedly forcing a flight crew member off the plane over nut-serving etiquette.

Cho Hyun-ah, 40, showed up at the Seoul Western Prosecutors' Office probing the case at 2:00 p.m. to face questioning as a suspect in the case.

Cho, the eldest daughter of the Korean Air chairman, resigned last week after a national uproar over her conduct aboard the flight at New York's JFK Airport.

She ordered the chief purser of the plane that was already on the taxiway to get off because she was displeased about the way she was served her macadamia nuts -- in an unopened pack instead of on a plate. She chastised the crew for not following the service manual for first-class passengers.

The flight, with some 250 other passengers aboard, had to return to the gate to deplane the purser, causing an 11-minute delay in its arrival at Incheon, Seoul's main gateway.

The transportation ministry said Tuesday they have filed a formal complaint with the prosecution against the younger Cho and will take disciplinary measures against the carrier.

According to inside sources, prosecutors are considering seeking an arrest warrant for the former vice president. (Yonhap)