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GFC 500 New servos, now this….

Glen Davis

By Glen Davis
in Avionics/Panel Discussion

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Glen Davis

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I had all four servos in my J model replaced last week. Now, on the second flight I get two error messages.  One is “yaw damper hardware fault”  and the other “AFCS preflight test failed”. I pulled the circuit breaker for the auto pilot and waited 30 seconds. I then pushed it back in. The error message about the AFCS preflight test failed went away, but came back shortly thereafter. Now, even when I reset the circuit breaker, I get the message and my auto pilot will no longer engage. 
 

My shop just swapped the 4 servos. Is there some adjusting of tensions or software settings they should have done in addition to the hardware swap?  

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