Garmin Ltd. has announced that it has received Federal Aviation Administration (FAA) Supplemental Type Certification $(STC)$ for its GFC 600 digital autopilot in Cessna 421B aircraft, covering serial numbers 421B0301 through 421B0970. This certification also extends to the Smart Rudder Bias system, which is now certified for use in Cessna 421B aircraft equipped with the GFC 600 autopilot. This development is a significant milestone for Garmin as it expands the list of compatible aircraft for this safety-enhancing technology. The GFC 600 digital autopilot is available immediately through select Garmin authorized dealers.
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