Originally Posted by gossend
Does anybody know what's going on here? Why replace the entire population for free?
To address issues we identified as contributing to pre-mature failure, we have incorporated hardware changes into the most recent build of these servos. In the case of a premature servo failure, your autopilot would be red X'd, and unavailable to use until you exchanged the servo. This is of course time consuming and inconvenient. The new servo hardware improves long term reliability so you will be less likely to find yourself with an inop autopilot at some point.
If your current servos are working just fine, there is no reason to act immediately. Sometime over the next 5 years, you can plan the servo replacement around a maintenance interval. Give us a call a few weeks ahead of time, and we will send you replacement servos for your aircraft.
More info can be found here