A 75-year-old Chicago man is under arrest after allegedly telling a flight attendant at a Long Island airport that there was a bomb in a bag he had left on a seat during deboarding.

Draco Slaughter yesterday entered a plea of not guilty to a charge of falsely reporting an incident and was ordered held on $50,000 bail.

Southwest Airlines Flight 373 had just arrived at 2:35 p.m. Sunday at MacArthur Airport, and passengers were getting off the plane when the attendant noticed the carry-on bag on an empty seat.

Nothing dangerous was found during the ensuing two-hour search, and the plane flew on to its final destination, West Palm Beach, Fla.