This first space shuttle concluded its maiden voyage on April 14, 1981
[DOC] [TLE] First Shuttle Launch | NASA [PAR] April 14, 1981, Landing of First Space Shuttle Mission ... From its maiden voyage 
in 1981 to its final touchdown in 2011, the capable, reusable ..... Air Force Base, 
Calif., to conclude STS-1, the first orbital shuttle mission on April 14, 1981.