F-15SA(Saudi Advanced) 0633 of the Royal Saudi Air Force U.S. serial 12-1073, is one of 84 aircraft acquired from Boeing using the U.S. intergovernmental FMS (Foreign Military Sales) sales program. The newer variant of the F-15 features fly-by-wire instead of digital electronic control systems and many other advanced features. The 0 in front of the RSAF serials was an error and will be removed at some point. F-15SA 0633 is assigned to the recently formed 29th Squadron based at the King Faisal AFB, Tabuk.