Double GPS system failure

Matt Dearden

English born professional pilot, writer, blogger and columnist. Currently flying the Pilatus PC-6 Turbo Porter in Papua, Indonesia.

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5 Responses

  1. Matt Dearden says:

    A follow up to this story, it turns out the problem with the GPS dropping off-line was traced to the rotating beacon. This particular aircraft is our only G950 equipped aircraft with a rotating beacon. Pilatus/Garmin are looking into it but for now the beacon’s had it’s CB pulled and locked off until a proper solution is found.

  2. Johan Prins says:

    Old thread, but interesting, as I had a anticollision strobe on the glider tow-plane that I built de-sensitize the comms radio, before I changed to a different strobe. Is the rotating beacon really a rotating, continuous, red light, or a flashing device? These create a lot of radio noise, enought to wipe out the faint GPS sat’s signals. What was the solution found / applied?

    • Matt Dearden says:

      The beacon is really a continuous red light with a spinning reflective shield to make it flash. I don’t actually know what the solution was in the end but it’s fixed now and both GPSs work fine with the rotating beacon on.

      • Johan Prins says:

        Hi Matt,

        I thought of that today: a rotating beacon has a motor to turn the reflector, which can create radio noise nearby and along the supply cable. A simple R/C (resistor/capacitor) combination and a few RF chokes (ferrite beads) right at the motor normally take these parasitic signals out. (I used to be a TV technie before going into IT – now completely different: renewable energies in the French outback, and som (too little) mountain flying.

        Have safe flights, with GPS’s always operational.

  3. Ian D says:

    I have really enjoyed every one of your blogs!
    Best of luck with your aviating!