When major work is completed on an airplane's avionics, the airplane requires a dedicated test flight to ensure everything is functioning properly. After another round of effort from Precision Avionics, the shop owner took "your" Cardinal up for a test flight of the autopilot — making a coupled approach into Griffin using the WAAS-enabled GPS. Read about it in this week's update. Learn more about the Cardinal at Oshkosh, including its speed and performance modifications during special forums on Tuesday, July 24, and Saturday, July 28, at the AOPA Big Yellow Tent.