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GFC500 Porpoise


Davidv

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The pitch trim servo went out on me a week ago. I was climbing out at 90KIAS when all of a sudden it pitched up like crazy, disconnected the GFC 500 manually when I got to 70KIAS. I wanted to see how far it would go. When I reengaged the AP it disconnected by itself. I have since replaced the servo, so far so good.

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16 minutes ago, thomas1142 said:

The pitch trim servo went out on me a week ago. I was climbing out at 90KIAS when all of a sudden it pitched up like crazy, disconnected the GFC 500 manually when I got to 70KIAS. I wanted to see how far it would go. When I reengaged the AP it disconnected by itself. I have since replaced the servo, so far so good.

That’s disappointing. Surprised it pitched so abruptly, thought the system would be smarter than that. Hopefully the next 20 years will be as problem free with the gfc as the last 20 with the BK system. 

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  • 6 months later...
28 minutes ago, Davidv said:

Just to close this out, it was finally determined that I had defective servos.  Garmin replaced them and now everything seems to work perfect.

Curious if they were from the original range of serial numbers that Garmin identified as bad or if this was from a newer batch?

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