FS2004 US Airways Airbus A321-231 Update. Project Airbus US Airways new colors (N508AY) texture update. While working on N196UW, it was noticed some details were not quite right on N508AY, so this update corrects all of those details. In addition, the tail texture was enhanced. Requires the file PROJECT_AIRBUS_A321-231_USA_N508AY.ZIP. As with the original package, these repainted textures are 32-bit with no mipmaps for best clarity and quality. Textures by Jeffrey S. Bryner.