When the flight attendant (Dominique Saint Claire) is walking towards a parked private jet, you can hear a jet engine seemingly indicating that airplane's engines are running. However, the aircraft's engines are covered (a common practice to protect them from elements and birds). A running engine is never covered.
The private jet in the scene was clearly parked for long-term storage and its engines were not running.
The private jet in the scene was clearly parked for long-term storage and its engines were not running.