NASA said Jan. 31 that it is adding a year to Computer Science Corp.’s nearly $105 million aircraft maintenance and modification contract. The one-year extension is worth $54 million and will keep Computer Science Corp. (CSC) in charge of maintaining aircraft at Johnson Space Center in Houston, Dryden Flight Research Center in California and Langley Research Center in Virginia through February 2012. CSC’s base contract began Sept. 1, 2009.