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Switching Over

Gemini Sparkle

Key Takeaways:

  • During a rescue flight, a pilot experienced a critical failure of their newly installed Garmin GTN 750xi avionics, making communication impossible and preventing switching to the backup COM2 due to a remote audio panel.
  • The incident highlighted the crucial need to discuss failure modes and backup procedures with avionics installers, and to carry reliable backup communication devices.
  • Key takeaways include having clear communication with ATC, prioritizing flying the plane, and landing immediately to sort out critical equipment malfunctions.
  • A critical failsafe was discovered post-incident: pulling the audio panel's circuit breaker can force a switch to COM2.
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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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