Dual PFD's with an Altitude Miscompare message (see photo), requires the aircraft Pitot system to be checked out by an Avionics Shop with a calibrated Pitot system. In a single PFD plane; ATC informs you the plane is at XXXX feet and the PFD indicates 75+ feet difference, or the PFD and your internal gauges are off …
Below are some sample questions dealer's ask during the RMA process. Come back frequently to see new entries: 1) s/n# 20012147 is out of warranty unit or not? Avidyne requires the tail number the unit was installed in. The pilot/owner can purchase the Entegra (PFD and MFD) extended warranty through avidyne.com…