After 20 years of delivering high-quality technical publication documentation to the aviation community we have decided to exit the market. Thank you for allowing us to serve you for the past 20+ years! If you are a subscriber to an Avantext AD Library, you're in good hands. Tdata will continue to fulfill and renew your subscriptions. To purchase or renew an Avantext AD Library, please visit www.tdata.com or phone 800.783.2827 for more information.