The Shuttle Carrier Aircraft
NASA’s Shuttle Carrier Aircraft (SCA) fleet consisted of two modified Boeing 747s. The iconic N905NA, a retired American Airlines 747-100, conducted the Approach and Landing Tests with the Space Shuttle Enterprise in the late 70s, still sporting its natural metal finish with an American Airlines red, white, and blue cheatline. N905NA had a long second career with NASA, finishing its service in fall of 2012 after ferrying Discovery, Enterprise, and Endeavor to their final display locations, and ultimately arriving in Houston, TX, to start a third career as a museum display, eternally ferrying the Space Shuttle replica Independence.