– FSX Northrop CASA SRF5-A flight2000it 16 years ago FSX Northrop CASA SRF5-A. A repaint of Tim Conrad’s F-5 Freedom Fighter for Flight Simulator X in the colors of CASA SRF-5A of the Spanish Air Force. Requires F5A_FSX.ZIP. By Enrique Medal. 2,7 Mb FSX – Northrop F-20 TigersharkFSX – Northrop P-61 Black WidowFSX – Northrop P-61B Black Widow Package Updated