As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) A/C WAS CLIMBING OUT. THE PILOT MADE A MANUAL TRIM UP SELECTION WHEN A HZ STAB TRIM RUNAWAY OCCURRED. THE PILOT SELECTED THE TRIM INTERRUPT SWITCH TO STOP THE RUNAWAY AND RETURNED. THE TRIM RELAY K 022 WAS REPLACED AND SYSTEM WAS GROUND CHECKED SERVICEABLE AND THE A/C RETURNED TO SERVICE. NO FURTHER PROBLEMS HAVE BEEN REPORTED. (TC NR 20070326002)