GFC 500 New servos, now this….

[Glen Davis]

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?  

[Andy95W]

https://www.aircraftspruce.com/catalog/avpages/iclothwipes10.php