As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ELEVATOR TRIM BECAME FROZEN IN-FLIGHT AND WAS NOT ABLE TO OPERATE TRIM WHEEL IN BELOW FREEZING TEMPERATURE. AFTER ENTERING SHOP, TRIM WHEEL WAS FREE, BUT STICKY. FOUND TRIM ACTUATOR CRACKED AND DIRTY. SUBMITTER STATED ACTUATOR MAY NOT HAVE BEEN SERVICED PROPERLY AND MAY HAVE IMPROPER GREASE.