Landmark Aviation - SDL provides avionics installation, avionics repair, major and minor airframe maintenance, parts, pre-purchase evaluation, wholesale parts; it services Astra Series, Beechcraft Single, Beechcraft Twin, Beechjet Series, Cessna, Challenger, Citation Series, Fairchild SA227, and Falcon aircraft. For technical support contact Brad Jacobs at (480) 948-2400 or [email protected]. Hours: 24/7.