Draco Slaughter's Legal Aid attorney entered a not guilty plea Monday to a charge of falsely reporting an incident.
Southwest Airlines Flight 373 had arrived at about 2:35 p.m. Sunday at Long Island MacArthur Airport.
Passengers were getting off the plane when an attendant noticed a carry-on bag on an empty seat. According to police, Slaughter said there was a bomb in it.
Nothing dangerous was found during a two-hour search. The plane traveled on to its final destination, West Palm Beach, Fla.
MacArthur Airport's commissioner, Teresa Rizzuto, said the pilot contacted airport law enforcement, who met the plane at the gate. "We take this stuff very seriously," she said.