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Switching Over

Gemini Sparkle

Key Takeaways:

  • During a rescue flight, a newly installed Garmin GTN 750xi navigation and communication system experienced critical malfunctions, freezing and preventing frequency changes due to its remote audio panel design.
  • The pilot landed safely, where an avionics technician revealed a crucial, previously unknown failsafe: pulling the audio panel's circuit breaker to switch to the backup COM radio.
  • The incident emphasized the importance of discussing potential failure modes with avionics installers, having reliable backup communication, maintaining clear communication with ATC during emergencies, and prioritizing a safe landing.
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founded a 501(c)(3) charity to combine my love of aviation and rescuing animals—dogs, cats, wolves, sea turtles, medical flights, discovery flights, angel flights…you name it. It’s similar to Pilots N Paws but open to all types of public benefit, not just saving animals. The charity owns and operates a 1982 Piper Turbo Saratoga SP, and we recently upgraded its avionics, installing a Garmin GTN 750xi as #1, moving a GNS 530 to #2. We went with a remote audio panel, as numerous people suggested. It seemed like a good idea, albeit a little weird not to have physical buttons. Little did I know this omission would cause an urgent situation later. 

When the avionics installation was done and, thanks to Covid-19, I picked her up when no one was there. Flew her home without any problems. A few days later, we had a three-hour rescue flight.

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