Launched in 1983, Sierra Industries offers more STC upgrades for legacy Cessna Citations than any other company, ranging from cockpit conveniences and custom avionics to Williams FJ44 re-engining programs. In addition, scores of experienced technicians and support personnel provide extensive maintenance, repair and overhaul services at two locations in South Texas for Citation models from early 500s thru the 650 series. Other Sierra offerings include air charter, aircraft sales and brokerage services and more. Visit them online at www.sijet.com for more details.