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Switching Over

Gemini Sparkle

Key Takeaways:

  • A newly installed Garmin GTN 750xi avionics unit malfunctioned mid-flight, causing communication issues and preventing the pilot from accessing the backup COM2 radio due to its integration with a remote audio panel.
  • The pilot landed safely, and an avionics technician subsequently arranged a warranty replacement for the faulty unit.
  • A critical takeaway was the discovery of an uncommunicated failsafe (pulling the audio panel's circuit breaker) to switch to COM2, which would have resolved the immediate communication problem.
  • The incident highlighted the importance of discussing failure scenarios with avionics installers, having independent backup equipment, maintaining clear communication with ATC, and prioritizing safe landing during emergencies.
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I 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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