The last I read is that the first, Prototype Vehicle PV-1, joined the program in 2003. The second demonstrator (TD-2) made its maiden flight on 6 June 2002. So only two of the six (if your source is correct abou the number) made 2003. The fourth LCA, PV-2, was completed in 2005 and was scheduled to first fly in June 2005. Not sure if it did? Anyone has an update regarding PV-2 and any new prototypes?