As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED A TRIM RUNAWAY IN FLIGHT (STAB TRIM DOWN) AFTER DEPARTING TEB. REMOVED AND REPLACED PITCH TRIM CONTROL RELAYS K021 AND K022 (P/N ON/OFF 974.20.01.212) IN ACCORDANCE WITH PILATUS WIRING DIAGRAM 27-40-00. PERFOMED HORIZONTAL STABILIZER OPERATIONAL TEST IAW PILATUS AMM 12-A-27-40-00-00A-903A-A. OPS CHECK SATISFACTORY.