When Brian is landing the plane, the landing gear is seen in the down position, then Brian instructs the "co-pilot" how to lower the landing gear.
The aircraft used in the movie is a three-engine Lockheed L-1011. When Brian adjusts the throttle, there are four levers shown, indicating he is flying a four-engine aircraft.
When an FBI agent falls off of a fuselage, you can see by the "FBI" on his jacket that it is a reverse print.
The beginning of the movie takes place in Long Island, New York. As the scene progresses, several palm trees can be spotted throughout the neighborhood and highway. New York is not a tropical location and no palm trees grow in this region of the United States.