As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE CLIMBING THROUGH 14000 FEET UP TO 17000 FEET, HAD RUDDER TRIM RUN AWAY TO THE LT. APPLIED THE APPROPRIATE MEMORY ITEMS AND CHECK LIST, DECLARED AN EMERGENCY AND RETURNED BACK. MAINTENANCE PERFORMED RUDDER TRIM AND AUTOPILOT ENGAGEMENT TEST, PERFORMED GVI. LEAK CHECKED RUDDER YAW ACTUATOR IAW MM 27-24-00 AND 22-11-00. NO DEFECTS OR DISCREPANCIES NOTED.