A friend has an RV9A with a single screen AFS 3500 EFIS and an AFS autopilot. When he disconnects his autopilot from the EFIS screen there is a very pronounced altitude bump. But when he disconnects the autopilot from the AFS autopilot head there is no bump. What could be causing this?
I have an RV9 with dual AFS 4500 with a TruTrak 385 Vizion autopilot and have never experienced this regardless of how I disconnect my autopilot.