There’s a corollary to the old saying that no flight is perfect: You learn something every flight.
The other day, I was giving instrument instruction in a Lancair Evolution equipped with the G900X (Garmin’s experimental version of the G1000 series of glass panels). During that flight, the vertical navigation (VNV) feature failed to perform as expected. This will come as no surprise to G1000 pilots, as VNV is one of the most finicky G1000 feature. However, I was able to capture exactly what happened and re-created it back in the office on the G1000 PC Trainer. What I learned caused me to change my VNV procedures.
