As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING DESCENT ELEVATOR TRIM WOULDN'T MOVE. ONCE ACFT REACHED LOWER ALTITUDE, TRIM WORKED AGAIN. SUSPECT MOISTURE IN ELEVATOR TRIM ACTUATOR MAY HAVE FROZEN. PURGED ELEVATOR TRIM ACTUATOR WITH NEW GREASE. OPERATIONS CHECKED OK. ACFT WAS RETURNED TO SERVICE.