Rudder Centering Problems After Landing

I recently completed a flight in the PIC767 after landing I turned off the runway only to find my rudder was messed up. The rudder would stick to the side I turned too. I checked trim and it was centered. A/P was used on final in high winds, but like I said trim appeared to be centered. This is the only a/c this happened in.Anyone know what to do?Wyatt