As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PRIMARY TRIM FAILED. ON LT SIDE CONTROL CANNOT TRIM NOSE DOWN, WORKS NOSE UP. RT SIDE TRIM WORKS NORMAL. REMOVED PILOT'S PRIMARY TRIM SWITCH, PN S3860 1, SN 0506 & INSTALLED NEW SWITCH PN S3860 1, SN 1328 IAW WIRING DIAGRAM 8912102. OPERATIONAL TEST WAS GOOD.