Every certified glass panel airplane needs backup flight instruments. Aircraft manufacturers and some glass cockpit owners are making the switch from traditional, round-gauge mechanical backups in favor of all-in-one backup EFIS systems.
The way we see it, if the primary flight data fails, you might only need backup attitude data to help you keep the wings level. Still, an all-in-one backup might be the difference between an emergency or comfortably motoring along to the destination. That’s because a backup EFIS functions as a mini PFD, presenting six-pack data on one screen in a format that’s nearly identical to the primary flight display. Not only does this eliminate awkward, partial panel scan, it offers additional gee-whiz appeal. But pricey proposals for installation can hinder upgrades for lesser aircraft. If these things were priced a few grand less, we think they would fly off shelves in record numbers.