As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMB OUT FROM CAPTAINS AND FIRST OFFICERS YOKE TRIM SWITCHES STOPPED WORKING AT TOP OF CLIMB. THE CREW ELECTED TO RETURN TO DEPARTURE AND LANDED WITH OUT INCIDENT. MAINTENANCE REMOVED AND REPLACED THE TRIM SERVO ACTUATOR AND ALL WORK DONE WAS IAW APPLICABLE MANUALS. AIRCRAFT WAS RETURNED TO SERVICE.