As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE DESCENDING INTO SUN LOST RUDDER TRIM CONTROL. RETURNED TO SLC. THIRTY MINUTES LATER, DESCENDING INTO SLC, TRIM CONTROL REGAINED. REPLACED RUDDER TRIM ACTUATOR IAW MM 272302 AND 272000, OPS CHECKS GOOD ON GROUND. (P/N 5298) (S/N 334) ON.