San Diego-based Crownair has acquired RoigWest Maintenance, a turbine aircraft maintenance and support center at Van Nuys Airport, the third busiest general aviation airport in the world, as well as West Coast Jet Services at McClellan Palomar Airport in Carlsbad, Calif. West Coast Jet Services will now be known as Crownair Aviation CRQ. Crownair plans to expand to Phoenix-Mesa Gateway Airport in Arizona by 2010.